A list of most characters in various mythology series by American author Rick Riordan.
Camp Half-Blood Chronicles
Introduced in Percy Jackson & the Olympians
Percy Jackson
Perseus "Percy" Jackson is a demigod, son of Poseidon and the mortal Sally Jackson. Percy lives on the Upper East Side of Manhattan. He has black hair and sea-green eyes. He has inherited special abilities from Poseidon, which include the ability to control water, boats, and ships; create small hurricanes; breathe and see clearly underwater; and talk to horse-like creatures and most aquatic animals. He struggles in his mortal life, having ADHD and dyslexia. This made him at first the subject of bullying from his peers. Percy is the first-person narrator in the Percy Jackson & the Olympians and The Senior Year Adventures. Percy is a gifted swordsman using his shape-shifting sword pen Riptide (Ancient Greek: "Anaklusmos") for battle. It always appears back in his pocket even if he loses it. He is currently dating Annabeth. In the films, Percy is portrayed by Logan Lerman. In the musical, he is portrayed by Chris McCarrell. Walker Scobell portrays the role in the TV series, with Azriel Dalman playing a younger Percy in flashbacks.
Grover Underwood Grover Underwood is a satyr and Percy's best friend. He has curly reddish-brown hair and fur, acne, and a wispy goatee. His horns grow larger as the series progresses, and he takes increasingly careful measures to hide them and his goat legs while posing as a human. When he first appears, he walks with crutches, which Percy eventually learns are to hide his goat-like trot. He uses reed pipes to play music and sometimes has a cudgel. In The Battle of the Labyrinth, Grover is bestowed a part of Pan's essence by the Lord of the Wild himself Pan. Grover also begins a relationship with the dryad Juniper. In The Lightning Thief, he earns a searcher's license after delivering Percy safely, allowing him to search for the lost god Pan. When Polyphemus captures him in The Sea of Monsters, he activates an empathic link with Percy that he had established a year prior and allows telepathic communication across great distances. At the end of The Last Olympian, he is named a Lord of the Wild and given a seat on the satyrs' ruling council, the Council of Cloven Elders. In The Heroes of Olympus, Grover mainly appears as one of Camp Half-Blood's satyr allies reporting on Gaea's rising and participating in negotiations with the Romans to get Reyna to help transport the Athena Parthenos statue across the world. In The Dark Prophecy, Meg summons Grover after getting a prophecy stating that she and Apollo will need a satyr guide. In The Burning Maze, Grover guides the two through the Labyrinth and, alongside the other nature spirits, aids in their fight against Medea and Caligula. After the death of Medea and Helios fading from existence, ending the California wildfires that he was causing, Grover returns to Camp Half-Blood. In The Chalice of the Gods, Grover volunteers to join Percy's quests to get recommendation letters from the gods so that he can get into New Rome University. Grover uses his nature spirit connections to help search for Ganymede's chalice of immortality and then to help Percy sneak into Mount Olympus to return it to Ganymede in the midst of Zeus' brunch for his mother Rhea. In Wrath of the Triple Goddess, Grover drinks a strawberry-flavored potion. He destroys Hecate's mansion and Hecuba and Gale escape the mansion, but later in the book, he helps to fix the mansion and get the pets back. In the films, he is portrayed by Brandon T. Jackson and Bjorn Yearwood as young Grover in the second film. In the musical, he is portrayed by George Salazar. Aryan Simhadri portrays Grover in the TV series.
Annabeth Chase
Annabeth Chase is a demigod, daughter of Athena and West Point history professor Frederick Chase. She has an extensive paternal family, including Magnus Chase. Annabeth has honey-blonde hair and gray eyes. She has arachnophobia, a fear shared by her siblings due to their mother's relationship with Arachne, whom Athena turned into a spider. She also has dyslexia and ADHD but is good at keeping them in check. She is currently dating Percy; she develops a crush on him over multiple books. Annabeth ran away from her father and stepfamily when she was seven and encountered Luke and Thalia. They lived as runaways until they were found by Grover and taken to Camp Half-Blood. Her attempts to bring Luke back into the fold are an important theme in the books. Her main weapon is a short celestial bronze knife given to her by Luke. Annabeth also has an invisibility Yankees cap, a gift from her mother. At the end of The Battle of the Labyrinth, Daedalus gives Annabeth an advanced laptop of his and she studies his works. She loses it and her knife in The Mark of Athena when she and Percy fall into Tartarus. In the films, she is portrayed by Alexandra Daddario, and Alisha Newton portrays a young Annabeth in the second film. In the American musical, she was portrayed by Kristin Stokes. Leah Jeffries portrays Annabeth in the TV series with her younger cousin Marissa Winans playing a younger Annabeth in flashbacks.
Chiron Chiron is a centaur with a white stallion body and a son of Kronos. He is Percy's mentor and the activities director at Camp Half-Blood. He is the mythological Chiron who was granted immortality by the gods for as long as he is needed to train heroes. In The Lighting Thief, he first appears disguised as a Latin teacher, Mr. Brunner, at Percy's school. He also gives Percy Riptide. In The Sea of Monsters, when Thalia's tree becomes poisoned, Chiron is blamed due to him being a son of Kronos and he is banished from camp. After Percy tricks Luke into exonerating Chiron, the centaur arrives with the Party Ponies, who are Chiron's cousins, to rescue Percy, Annabeth, Grover, and Tyson from the Princess Andromeda. In The Battle of Labyrinth, Chiron becomes suspicious of the new sword instructor Quintus, who later turns out to be Daedalus in disguise. He also organizes the quest into the Labyrinth and participates in the battle with a monster army invading from the maze. Although Chiron is badly wounded, he survives the fight. In The Last Olympian, Chiron leaves Percy to lead the army of Camp Half-Blood while he gathers much-needed reinforcements from the Party Ponies. Chiron directly confronts and is defeated by his father Kronos in battle. After Kronos' eventual defeat, Chiron allows Rachel into Camp Half-Blood to become the new Oracle of Delphi. In The Lost Hero, Chiron refuses to tell the Greeks about the Romans as he has sworn to keep the secret due to the historic rivalry between the two. He eventually admits the truth about the Greeks and Romans after the quest to rescue Hera and the discovery of Bunker 9, but Chiron does not know where the Roman camp is. In The Blood of Olympus, Chiron participates in the final battle with Gaea and leads a funeral alongside Nico for the campers who were killed in the battle, Greek and Roman. In The Hidden Oracle, six months later, Chiron is still in charge of Camp Half-Blood, and he is dealing with missing campers, down communications and the arrival of a now mortal Apollo. He later participates in the battle with Nero's automaton. In The Tower of Nero, Chiron is away from camp when Apollo and Meg return months later to face Nero. Chiron returns in time to receive a message from Rachel summoning reinforcements from camp which Chiron personally leads, disguising it as a field trip for the youngest campers. In The Sun and the Star, Chiron is left alone at camp with Dionysus, Nico, and Will when the vast majority of the campers decide to return home for the school year. Along with the wine god, Chiron reluctantly authorizes the two demigods to go on a quest to Tartarus to rescue Bob and greets them upon Nico and Will's successful return with the Titan. In Wrath of the Triple Goddess, Chiron surprises Percy by becoming his substitute history teacher at Alternative High School, although Chiron explains that it is simply a coincidence. Wanting to simply be a teacher sometimes, Chiron got Paul Blofis to put him on the district's substitute list. Percy then learns that Chiron's wheelchair is not just a disguise; he was previously accidentally shot in the leg by Hercules, causing him to have difficulty walking. Chiron provides Percy with information on Hecuba and is gone a few days later, much to Percy's disappointment. Chiron is played by Pierce Brosnan in The Lightning Thief film and by Anthony Head in The Sea of Monsters film. In the musical, he is portrayed by Jonathan Raviv. In the TV series, he is portrayed by Glynn Turman, with the character depicted with a leg brace on his left hind leg as the result of the war injury.
Luke Castellan Luke Castellan was a son of Hermes and May Castellan. He is described as handsome, with blonde hair, blue eyes, and a long scar on the side of his face given to him by Ladon. Besides the ability to open locks with his mind, which he inherited from his father, Luke is an excellent swordsman. Introduced initially as the friendly head counselor of the Hermes cabin, Luke was resentful of his father, who adhered to the gods' policy of non-interference despite Luke's mother May Castellan's mental illness. Luke runs away from home at nine years old and eventually arrived at camp aged fourteen with Annabeth and Thalia. After the loss of Thalia, a failed quest and continued silence from Hermes, Luke's ongoing resentment turned into a strong hatred of his father and the other gods. At the end of The Lightning Thief, he is revealed to serve Kronos and receives a sword named "Backbiter" from Kronos. It is later reforged as Kronos' scythe and has the ability to harm both mortals and immortals. Just before giving himself over completely to host the spirit of Kronos, Luke bathes in the River Styx and obtains the invincibility of Achilles. At the end of the series, Luke is eventually convinced to fight against Kronos, committing suicide to destroy the Titan, who was using Luke as his host, by stabbing himself in his "Achilles' heel" with a celestial bronze knife he had given to Annabeth when they first met with a promise to always remain her family, which becomes cursed after Luke's defection. When he died, Luke reiterates what Ethan had told Percy before: Unclaimed children and unrecognized gods deserve more respect than they had been given. In the films, he is portrayed by Jake Abel, with Samuel Braun as a young Luke in the second film. In the musical, he is portrayed by James Hayden Rodriguez. Charlie Bushnell portrays Luke in the TV series.
Thalia Grace
Thalia Grace is the daughter of Zeus and Beryl Grace, a TV starlet. Her brother Jason was seven years younger than her. Due to her mother's abusive nature, Thalia had considered leaving home since she was little, but stayed to protect Jason. When Jason is sacrificed to Hera by their mother during a visit to Sonoma Valley, Thalia finally runs away and stays on the run with Luke and Annabeth until they met Grover when she was 12. When they reached camp, Hades sent a horde of hellhounds that Thalia held off, sacrificing herself for her friends. Zeus pitied his daughter and turned her into a pine tree; her spirit then provided a magical barrier around the camp, keeping mortals and monsters out. Seven years later, she is separated from the pine tree with the Golden Fleece, which was applied to save it from poisons that were destroying the magical barrier protecting the demigods. No longer assumed dead, she is the oldest surviving child of the Big Three gods, and thus was first in line to be the child of the prophecy. In The Titan's Curse, she is one of three chosen by Zoë to accompany her on her quest. On this quest, she is confronted by Luke, who she has not seen since she was turned into a pine tree. She refuses his offer to join him in his crusade. At the end of The Titan's Curse, she becomes the lieutenant of the Hunters of Artemis which freezes her age the night before her 16th birthday and prevents her from being the child of the prophecy. She returns occasionally to aid characters in later books. Thalia has bright blue eyes and short, spiky black hair, and wears black eyeliner and punk style clothing. Jason describes her as having a Mediterranean complexion. She also shares some traits with her father, such as his pride, confidence, and vehement reactions to betrayal or contradiction. An incredibly skilled warrior, Thalia's weapons are a replica of the shield Égida named Aegis and a spear. Her main power is the ability to summon lightning and generate electric shocks. In The Titan's Curse, she ironically shows a fear of heights, despite being a daughter of Zeus. She is portrayed by Paloma Kwiatkowski and Katelyn Mayer as the young Thalia in the second film. In the TV series, she is portrayed by Tamara Smart. Unlike the books, Thalia was saved from the Furies by Zeus and he turned her into a tree when she declined to become her father's "weapon". Her tree was poisoned by Luke using Python blood. When the Golden Fleece was placed onto the tree by Clarisse, Thalia emerged from the tree and her electrokinesis repelled Luke's army while knocking herself and Luke out for three days.
Zoë Nightshade
Zoë Nightshade was the daughter of Atlas and Pleione. She was introduced as one of Artemis' huntresses, appearing in The Titan's Curse. She was described as looking around 14 years of age, although it was later revealed that she was well over 20,000 years old and a former Hesperid. Zoë is described by Percy as being tall, graceful and gorgeously beautiful with brown eyes, a slightly upturned nose, long dark hair braided with a silver circlet on the top, and copper-colored skin. She was said to have the same cold look in her eyes when she got angry, as her father, the Titan Atlas. In her early life, Zoë helps Hercules complete his quest on stealing the golden apple. After her sisters had found out about what she had done, they exiled her. This pained Zoë, knowing that the Hesperides were her only family. Ultimately, Hercules never gave Zoë any credit and eventually abandoned her causing her to hold a grudge against male Heroes. After her incident involving Hercules, Zoë joined the Hunters of Artemis. Zoë eventually rises to become Artemis' loyal lieutenant for over 2,000 years. Throughout the book, Zoë talks in Early Modern English. She also was said to speak in an old, strange accent. Zoë shows particular interest and love for the stars. After her death, caused by Ladon attacking her and Atlas' final blow, she is turned into a constellation of herself by the goddess Artemis. In the TV series, she is portrayed by Saara Chaudry.
Tyson Tyson is a Cyclops and Percy's half-brother. He is tall with unkempt teeth and fingernails, brown hair, and an eye. He is described as seemly young though intelligent. As a Cyclops, he has immunity to fire, super strength, an uncanny ability to mimic voices, enhanced senses, and understands the "old tongue" (the language spoken by Gaea to her first children). Tyson is close with several characters and magical creatures in the series, including Rainbow the hippocampus, the hellhound Mrs. O'Leary, and the harpy Ella, who eventually becomes his girlfriend. In The Sea of Monsters, Tyson first appears as a huge homeless kid that is taken in as a class project by a school called Meriwether Prep. Tyson is sensitive, childish, and bullied with Percy being his only friend. He defends Percy when the Laistrygonians attack in the guise of a dodgeball game. Percy is forced to take him to camp, and a short time after they arrive, it is revealed that he is a baby Cyclops and thus a son of Poseidon, making him Percy's half-brother. Tyson faces a great deal of prejudice from the other campers due to his monster heritage and frustration from Percy when Poseidon claims Tyson as his son, causing Percy to be bullied as well. Charles Beckendorf's father, Hephaestus, employs Cyclopes, and he befriends Tyson and trains him in metalworking. When Percy and Annabeth secretly leave on a quest for the Golden Fleece, they only reluctantly take Tyson along and he befriends the hippocampus Rainbow who transports them to the Princess Andromeda. His gift to Percy, a wristwatch that Tyson had spent the summer working on, is a shield. In The Last Olympian, Percy meets his brother again a year later when, after the destruction of the Princess Andromeda, he ends up in Atlantis. He later helps to defeat Typhon, leading Poseidon's army of Cyclopes. Following the defeat of Kronos, Zeus commends Tyson's bravery by making him the General of the Cyclopes. In The Son of Neptune, Tyson is searching for the missing and amnesic Percy. When Percy's memories begin to return and he is unable to Iris message any of his friends, Percy manages to contact Tyson through a dream. Ella comments on Tyson's bravery and Percy notices that his brother is blushing, causing Percy to tease him about the romance blooming between Tyson and Ella. Tyson takes part in the Battle of New Rome, effortlessly killing Ma Gasket and her children and also battling Earthborn. In The Mark of Athena, Tyson is present when the Argo II arrives. After Ella issues a prophecy, Percy discreetly orders Tyson to take Ella away, not wanting Octavian to learn of the harpy's knowledge of the lost Sibylline Books. After things go south, Percy contacts Tyson and orders him to take Ella to Camp Half-Blood where the harpy will be safe. In The Blood of Olympus, Tyson is mentioned to have brought in a few friendly Cyclopes to aid in Camp Half-Blood's defense. Tyson brings Ella and Coach Hedge back to Camp Half-Blood on Rainbow and relays Reyna's message about her intention to come at sunrise. During the ultimate battle with Gaea, Tyson leads the friendly Cyclopes against the Earth goddess and her monster army. Afterwards, with the powers of prophecy no longer working, Tyson joins Ella and Rachel in traveling to New Rome in the hopes of reconstructing the Sibylline Books, the only source of prophecies left at the moment. In The Tyrant's Tomb, Tyson and Ella have settled in New Rome where the harpy has been using her photographic memory to reconstruct the lost Sibylline Books. In The Court of the Dead, Tyson is mentioned to still be living in New Rome with Ella and running their bookstore together. While they do not appear, Tyson and Ella help Johan with his research and the Cyclops crafts the harnesses used by the demigod-mythic strike team to carry the Coco Puffs into battle. In the films, he is portrayed by Douglas Smith. In the TV series, he is portrayed by Daniel Diemer.
Nico di Angelo Niccolò "Nico" di Angelo is an Italian-born Greek demigod who is the son of Hades and the Italian mortal Maria di Angelo. He is 10 years old in his first appearance in The Titan's Curse and 15 years old in his latest appearance in The Court of the Dead. He is an Italian boy with black hair, dark brown eyes, and olive skin. Nico is first seen in The Titan's Curse as an unclaimed demigod rescued by Percy, Annabeth, Thalia, and Grover. At the end of the novel, it is revealed that Nico is a time-displaced son of Hades. Despite biologically being 10 years old when first introduced, he and his elder sister Bianca were born in the 1920s. After Zeus killed their mother Maria while trying to kill the children, Hades wiped their memories and placed them in the Lotus Hotel, where time stands still for decades, before they were removed and brought to the military academy Westover Hall. He is native to Venice and can speak Italian (as his native language). Nico is initially depicted as cheerful and childlike, with olive skin and dark hair. He enjoyed playing Mythomagic, a Greek mythology-themed card game. He takes the death of Bianca very hard, becoming moody, secretive, and irritable blaming Percy Jackson for it, though he later forgives him. Afterward, he lived in the Underworld with his father Hades, where he becomes pale and shaggy-haired and begins wearing dark clothing. Nico, despite being very powerful, is extremely lonely, much like his father. His weapon is a Stygian iron sword, capable of absorbing monsters' essences rather than banishing them to Tartarus. Nico's suggestion that Percy take on the curse of Achilles and his work to convince Hades to fight in The Last Olympian is crucial to the Olympians' success. He brings his half-sister Hazel back from the dead and establishes her at Camp Jupiter. At the end of The Son of Neptune, Nico travels through Tartarus to find the monstrous side of the Doors of Death. In The Sun and the Star, two months after The Tower of Nero, Rachel gives Nico and Will the prophecy for their quest to Tartarus for the twelfth time, prompting Nico to convince a reluctant Chiron to give them an official quest. Greek American novice actor Levi Chrisopulos portrays Nico in the TV series.
Rachel Dare Rachel Elizabeth Dare, also known as the "Oracle of Delphi", is a mortal girl who can see through the Mist, the force that obscures gods and monsters from most mortals. Her father, Walter Dare, is a rich businessman, a fact which she is rather averse to. She first meets Percy in The Titan's Curse at the Hoover Dam, and they become friends. In The Battle of the Labyrinth, she guides Percy through the Labyrinth to Daedalus' workshop. It is hinted that she has some romantic feelings for Percy (which are noticed by Annabeth, who becomes extremely jealous). In The Last Olympian, she experiences strange visions about the Second Titan War. Later, after speaking with Chiron, she decides to become the new Oracle of Delphi, according to her fate. She gives up her feelings for Percy, her life as she knows it, and chances the tormented fates of her predecessors to take on this daunting task. She has been driven mad like other oracles have. Her role as the oracle greatly aids the characters for the rest of the books. Rachel's first act as the Oracle is to deliver the next Great Prophecy, setting the plot of The Heroes of Olympus. Following the loss of Delphi to Python, Rachel stops visiting camp and begins a frenzied attempt to regain her foresight. Once informed of Apollo's arrival, Rachel returns and learns that not only Delphi is lost, but also three other Oracles, and that only Rhea's Dodonian Oracle is still valid. She becomes upset upon learning of the existence of other Oracles, as Apollo has not told her before. In The Tower of Nero, Rachel regains her powers of foresight after Apollo kills Python and helps him battle Nero. She also provides Nico and Will with a prophecy. In The Sun and the Star, two months after regaining her powers, Rachel has been forced to repeat her prophecy for Nico and Will's quest twelve times until they actually leave on it. It is later revealed that Hades had sent Nico the prophecy through Rachel so that Nico would rescue Bob. She has red hair and freckles, is skilled at painting and drawing, and occasionally shown as a non-ADHD foil for her demigod teammates. Percy remarks on her ability to stand still for a long time at a charity event. Rachel has the power of foresight.
Clarisse La Rue Clarisse La Rue is a daughter of Ares and the former lead counselor of the Ares cabin at Camp Half-Blood. She is hot-tempered, courageous, strong, an incredible fighter (usually using an electric spear), and a good military strategist. She can be stubborn and overconfident, much like her father. Despite their similarities, Clarisse has a fear of her father and disappointing him. This, along with a strong sense of honor and pride, often motivates her actions. She is aggressive toward most demigods, though she does respect and make friends with a few. In The Sea of Monsters, Clarisse is given the quest to find the Golden Fleece. She is a main character in the short story "Percy Jackson and the Stolen Chariot". In The Last Olympian, Clarisse initially sits out the war for Olympus due to a personal feud. Enraged after the loss of her friend Silena, she later joins the battle, slaying a drakon and receiving the blessing of Ares. In The Blood of Olympus, Clarisse leads the Greek demigods into battle to defend the camp. In The Wild Zone, she, Katie, Harper, Zuri, Benny, and Grant go to The Wild Zone. In the film adaptations, she is portrayed by Leven Rambin. In the musical, she is portrayed by Sarah Beth Pfeifer. Dior Goodjohn portrays Clarisse in the TV series.
Will Solace William Andrew Solace, also known as Will, is a demigod, son of Apollo and the mortal Naomi Solace. He is a minor character in both Percy Jackson & the Olympians and The Heroes of Olympus, though becomes a supporting character in The Trials of Apollo, and finally becomes the deuteragonist of The Nico di Angelo Adventures. He is the camp's best combat medic and is stated to run the infirmary several times. He is also the head of the Apollo cabin after the death of Michael Yew. In contrast to his siblings, he lacks skills in archery due to his inherited gifts being for healing rather than combat. Though he later discovers he has several abilities, including using light rays and diseases alike as a weapon. In The Last Olympian, when Annabeth had a knife wound in her shoulder, Will uses his healing powers to help cure Annabeth. In The Blood of Olympus, Will attends a head counselor meeting discussing the situation with Romans. Will helps deliver Chuck, the son of Mellie and Gleason Hedge. Shortly after this, Will and Nico's team sabotages the Roman onagers, with Will using his ultrasonic whistle to help stun both the Greeks and Romans. In The Hidden Oracle, Nico and Will are shown to have started dating each other in the six months since the battle. When Will's now-mortal father Apollo arrives at camp, Will and Nico aid Apollo in his quest and in adjusting to being mortal. After the battle with Nero's forces, Will treats the worst of the camp's cases of hay fever caused by Apollo's plague arrow. In The Tower of Nero, Nico becomes depressed following the death of Jason as well as his other losses; Will is supportive and concerned for his boyfriend during these times. During the final battle with Nero, Nico and Will help Apollo alongside the troglodytes, with Will at one point arriving with unexpected reinforcements from camp, just as Nero has the upper hand. Following Nero's death, Will helps treat everyone's injuries and helps Apollo prepare for his final battle with Python. In The Sun and the Star, two months after receiving their prophecy, Nico and Will are the last kids at camp after all of the other demigods, including the year-rounders, choose to leave to see the world or to be with their mortal families at the end of the summer. In The Court of the Dead, Will's archery skills vastly improve after months of training. He is also able to purposefully use his light as a flashbang and when enraged, glows bright and hot enough to harm a minor goddess at a distance and has to power down to avoid accidentally incinerating Hazel with his touch when Will catches her.
Calypso Calypso is the daughter of the Titan Atlas, who is imprisoned on the island of Ogygia for supporting her father during the First Titan War. She first appears in The Battle of the Labyrinth, where she nurses Percy back to health. She falls in love with Percy and is heartbroken when he has to leave. Percy asks the gods to release her at the end of The Last Olympian, but she is still residing there when Leo becomes trapped on Ogygia in The House of Hades, having been released from the curse of being forced to fall in love with all those to fall upon the island rather than the island itself. Leo and Calypso subsequently fall in love legitimately. When Leo leaves the island, he swears on the River Styx that he will return for Calypso. At the end of The Blood of Olympus, Leo gets back to Ogygia and frees Calypso. In The Hidden Oracle, Calypso comes to Camp Half-Blood with Leo and reveals that, due to her choice to leave Ogygia, she has become a mortal. She accompanies Leo and Apollo in the latter's quest to find the Oracles and stop the Three Emperors from conquering North America. At the end of The Dark Prophecy, Calypso stays at the Waystation, while Leo goes to warn Camp Jupiter of an impending invasion and Apollo travels with Meg to search for the Erythraean Sybil. During The Dark Prophecy, Calypso regains her ability to use magic, although the goddess Britomartis suggests that she had simply lost control of her powers rather than losing them altogether. With training from Josephine, Calypso begins regaining control over her magic. As a sorceress, Calypso can command wind spirits to do her bidding. She loses most of her control of them when she gives up her immortality; however, she is still capable of summoning them to a degree, though by consuming more power than usual. Also, due to spending a long time at Ogygia, she has mastered sewing and lock-picking, which she uses while finding the gryphons at Indianapolis Zoo. She is Leo's girlfriend as of The Blood of Olympus, The Hidden Oracle, The Dark Prophecy, and The Burning Maze. In The Tower of Nero, Leo reveals that Calypso is enjoying attending high school and is currently working as a counselor at a mortal band camp for kids. The two are currently in a fight due to Leo's disrespectful behavior toward women, but both Leo and Reyna are sure that they will work it out when she returns at the end of the summer.
Iapetus / Bob the Titan Iapetus, commonly known as Bob the Titan, is the Lord of the West and the father of Atlas. Bob first appears as one of the main antagonists of "Percy Jackson and the Sword of Hades". He subsequently appears as a main character and a supporting character in The House of Hades and The Sun and the Star. In "Percy Jackson and the Sword of Hades", Ethan uses the sword of Hades to release Iapetus from where he has been locked in Tartarus for millennia. Iapetus battles Percy, Nico, and Thalia and is thrown into the River Lethe. It erases the Titan's memories, leaving him with a childlike personality. Percy convinces the amnesic Iapetus that he is their friend Bob and he heals Percy's injuries from the fight and aids him in confronting Persephone over her secret creation of the sword in the first place. Bob is subsequently employed as a janitor in the Underworld by Hades. In The House of Hades, while trapped in Tartarus, Percy and Annabeth briefly reminisce about Bob, inadvertently summoning him to their aid when the Titan overhears them. Bob acts as a guide and protector to Percy and Annabeth, his knowledge of Tartarus from his time trapped there proving vital in their quest to reach the Doors of Death and escape. However, the regenerative effects of Tartarus on monsters starts to heal Bob's mind and slowly restore his memories, including the fact that Percy was the one who erased them in the first place. Bob befriends Small Bob, a saber tooth cat inadvertently created in The Titan's Curse. In The Tower of Nero, Nico begins hearing a voice calling out to him for help from Tartarus. Nico later reveals to Apollo that he believes that the voice is Bob, suggesting that the Titan had in fact survived his battle with Tartarus at the Doors of Death. In The Sun and the Star, he is rescued from Tartarus by Nico and Will. Having been killed fighting Tartarus, a reforming Bob was captured by Nyx who stuck the Titan in a permanent regeneration cycle.
Introduced in The Heroes of Olympus
Reyna Ramírez-Arellano Reyna Avila Ramírez-Arellano (also known by her initials RARA) is a Puerto Rican demigod. She is a daughter of Bellona, a Roman goddess of war, and the younger sister of Queen Hylla of the Amazons. She and her sister worked for Circe during the events of The Sea of Monsters where Reyna was one of the attendants who looked after Annabeth. After Percy and Annabeth escape and free Blackbeard and his crew, Reyna and Hylla were captured by the pirates before eventually escaping and going their separate ways. Reyna found the way to Camp Jupiter, where she became the praetor of the Twelfth Legion just four years after she joined. She is a well-respected but distrustful leader in New Rome. When she found out about the Greek demigods, Reyna chose not to pursue revenge, despite the difficult history between them, in part due to the impeding battle, which she understands Greeks and the Romans will have to be united to win. She is described as intimidating and a natural leader; she has glossy black hair and very dark brown eyes. Reyna is a praetor at Camp Jupiter. Reyna's demigod ability is the power to lend her energy, skills, and character traits to nearby demigods. Similar to Leo, she can speak English, Latin and Spanish. Reyna is often accompanied by two magical dogs, Aurum and Argentum, or by her pegasus Scipio ("Skippy" dies after their trip from New York to Greece in The House of Hades after being slashed by a griffin's poisonous claw). Pegasus awards her the title of "Horse Friend" because of her kindness toward Scipio and his descendants. Unlike other characters, Reyna does not have an explicit "fatal flaw", leading to fan speculation including overprotection, distrust, and holding grudges. In The Blood of Olympus, she, Nico, and Coach Hedge go on a quest to return the Athena Parthenos to Camp Half-Blood. While shadow-traveling to New York, the trio stops in San Juan and visits Reyna's former house, haunted by the ghosts of her relatives. There Reyna reveals that the Ramírez-Arellano family (which includes Roberto Cofresi and Captain Marion Frederic Ramírez de Arellano) has always been favored by Bellona. Reyna's father (an Iraq War veteran) deeply loved the goddess, but his PTSD turned this love into an unhealthy paranoia. When Reyna was ten years old, he became a mania. When the mania attacked Hylla, young Reyna picked up the closest weapon and killed what remained of her father. Reyna is reluctant to discuss the incident because patricide is "unforgivable" in New Rome. Reyna had romantic feelings for Jason, which is shown throughout the series and noticed by several characters. After Jason had disappeared, it is implied that she briefly considered Percy a romantic partner. In The Tyrant's Tomb, Reyna is revealed to be asexual. Following the Battle of San Francisco Bay, Reyna resigns as praetor and instead joins the Hunters of Artemis. In The Tower of Nero, after becoming a god once again, Apollo encounters Reyna who is settling in well with the Hunters and has been mentoring Leo in his behavior toward Calypso.
Leo Valdez Leonidas "Leo" Valdez is a son of Hephaestus. He likes to joke around and relies on his sense of humor to bury the pain he feels due to his troubled past. He has curly brown hair, brown eyes, a cheerful face, a slim and scrawny build, dark skin, and a mischievous smile. He is Hispanic-American and speaks Spanish. Leo can create and manipulate fire. He also has severe ADHD, even by demigod standards. He is an excellent mechanic and at one point repairs a bronze dragon running wild in the camp's woods, which he names Festus (Latin for "happy"). Inspired by a blueprint in Bunker 9, an abandoned bunker in the camp's woods, and a picture he drew in kindergarten, he also creates the Argo II, the flying ship the seven demigods of the Great Prophecy sail on to reach Greece. When Leo was eight, Gaea burned down his mother's machine shop, resulting in her death, and leading him to believe that it was his fault as he had, and still has, pyrokinesis. Leo's remaining family blamed him for her death and left him a foster child. He meets Piper at the Wilderness School in Nevada. Leo sometimes thinks of himself as a seventh wheel, because in the group of seven he is alone with three couples, as for the first three books of The Heroes of Olympus, because of his insecurities. In The Blood of Olympus, Leo sacrifices himself to annihilate Gaea, but is brought back to life using the Physician's Cure and returns for Calypso on her island, Ogygia.
Festus Festus is a mechanical dragon made by the Hephaestus cabin at Camp Half-Blood, and given wings by Leo years later. He was first encountered in "Percy Jackson and the Bronze Dragon" where Festus goes on a rampage before being shut down by Percy, Annabeth and Charles Beckendorf, who intend to reprogram Festus. In The Lost Hero, Festus has gone out of control ever since Beckendorf's death, but Leo's immunity to fire allows him to corral and tame the bronze dragon. Festus transports Jason, Piper, and Leo before being destroyed by a crash-landing at King Midas' mansion. Leo asks Hephaestus to take his head to Bunker Nine at Camp Half-Blood, where he later repairs him to be the figurehead on the Argo II. Festus acts in this role throughout The Mark of Athena and The House of Hades, acting as the ship's control interface and occasionally helping to defend against attacks. In The Blood of Olympus, Festus is secretly rebuilt by Leo and plays a vital role in the defeat of Gaea, lifting the primordial goddess high in the air where she's weaker and holding Jason and Piper steady as Piper charms the goddess to sleep. After Gaea's defeat, Festus resurrects Leo with the Physician's Cure and helps him rescue Calypso. In The Trials of Apollo, Festus acts as one of Apollo's allies. In The Burning Maze, Festus transports Leo to Camp Jupiter to warn them of an upcoming attack and is mentioned to have helped to defend the camp. In The Tower of Nero, Leo mentions that he's using Festus as his workshop while Leo teaches homeless kids shop skills.
Piper McLean Piper McLean is a daughter of Aphrodite and famous actor Tristan McLean. She is fifteen in The Lost Hero. Unlike most children of Aphrodite, Piper is not particularly obsessed with beauty or fashion. Piper is Cherokee on her father's side. She has tan skin, eyes that change color constantly, and choppy chocolate-colored hair which she cuts herself. Her demigod powers include "charmspeaking" (magical hypnosis) and the ability to speak French, as it is "the language of love". She is also occasionally able to see visions in her magic dagger Katoptris (ancient Greek for "mirror"), which once belonged to Helen of Troy. The dagger lost that power after the battle against the giants in Athens. Piper's relationship with her father is mutually affectionate but strained, in part because of the small amount of attention he gives for her. After he is kidnapped by the giant Enceladus in The Lost Hero and subsequently rescued by Piper, Jason, and Leo, Mr. McLean's relationship with his daughter begins to improve. Piper is also very close to Jason and Leo, who are her best friends. She is also friends with all of the seven quest members in The Heroes of Olympus. Piper's main weapon is Katoptris, though she later acquires a magic cornucopia and uses it as a weapon. After being captured by pirates in The House of Hades, Piper asks Hazel to teach her sword fighting, using a jagged celestial bronze sword taken from the Boread Zethes. In The Hidden Oracle, Nico mentions that Piper is currently attending school in Los Angeles, together with Jason. In The Tower of Nero, Jason is still one of her best friends. Later, she is revealed to be in a relationship with a mortal woman named Shel. In The Sun and the Star, after returning from Tartarus, Piper reveals that she is truly happy with Shel.
Jason Grace Jason Grace was a son of Jupiter and the mortal Beryl Grace, and the younger brother of Thalia. He was raised by the wolf goddess Lupa and her pack, then later lived at Camp Jupiter. Jason inherited many special powers from his father Jupiter like summoning lightning bolts; controlling winds; flying; summoning storm spirits; and creating different types of storms like thunderstorms, rainstorms,