Aarushhh/wikipedia-simple-splitted huggingface dataset:
Aphrodite/Venus - The Goddess of Love, Beauty, Lust, etc. She is mentioned in The Lightning Thief and appears briefly in The Titan's Curse. Her children (mostly girls) live in Cabin 10. She wears a red satin dress and has long dark-brown hair in ringlets, though she sometimes wears it down. Her appearance changes as Percy looks at her, matching every female he has ever had a crush on (one being Annabeth). She encourages Percy to pursue a quest for true love. She is shown to have interest in Percy's feelings towards Annabeth and promises to make Percy's love life hard. She appears again at the Council of the Gods and votes to let Percy live. Aphrodite is also the last child of Ouranos. Aphrodite is also the mother of Piper McLean, a main character in The Lost Hero, and changes her daughter's tomboyish appearance twice to make her more beautiful.
Apollo - The God of the Sun. The campers in Cabin 7 are his children. He drives a flying red convertible, a Maserati Spyder, that glows brightly like the sun. He appears to be about 18 or 19 years old and has sandy colored hair and dazzling white teeth. Apollo wears Ray-Ban sunglasses and sports an iPod. Percy notes that he looks similar to Luke, but less evil. He also loves to recite poetry, especially haikus; Percy describes them as so bad that he would rather be shot by an arrow than listen to one, but Zoe says his limerick days were much worse. Apollo helps Percy and his friends by flying them to Camp Half-Blood in The Titan's Curse and later speeding up a train while being disguised as a homeless man. In The Last Olympian, he heals Annabeth's broken arm after she was thrown into her mother's throne. Apollo is also the god of prophecy and controls the Oracle. At the end of the war between the Titans and the gods, Rachel is certified as the new Oracle by Apollo. His name is both Greek and Roman.
Ares/Mars - The God of War and Bloodlust. His children are the campers in Cabin 5. He first encounters Percy in The Lightning Thief. Ares drives a large, black, Harley-Davidson motorcycle with a flame-pattern paint job, a boar themed antenna, handles, boars head shaped red headlight and a leather seat made from human skin. He wears red wraparound sunglasses that cover his eyes, which are flames, a bulletproof vest, combat boots, black leather biker clothes, and a black leather duster. His face is covered with scars from many fights. Once, Ares sends Percy, Grover and Annabeth to retrieve his shield, which he left behind after a date with Aphrodite. They travel to a Tunnel of Love, which ends up being a trap set by Hephaestus. He intercepts Zeus's master bolt from Luke in The Lightning Thief and gives Percy a backpack containing it. He wants to cause discord among Zeus, Poseidon and Hades. Later, he is overpowered by Percy in a duel. He curses Percy that his sword will fail him in battle and departs
. Ares returns with minor roles in The Sea of Monsters and The Titan's Curse. He is seen at the end of The Last Olympian after giving Clarisse a blessing during battle and is very proud of her.
Artemis/Diana - The Goddess of the Moon, Wild Animals, and the Hunt. She is the twin sister of Apollo. Cabin 8 at Camp Half-Blood is dedicated to her, though it is unoccupied, except for the rare visits when her group of huntresses stays at the camp, such as in The Titan's Curse. She is a maiden goddess and bears no demigod children. She has a prominent role in The Titan's Curse. Artemis appears to be about 12 years old. She has auburn hair and silvery-yellow eyes, the color of the full moon. Artemis leads a group of teenaged girls known as  the Hunters of Artemis. The Hunters pledge to give up love in exchange for immortality. The Hunters never grow up and can only die if they are killed in battle or break their oath. Artemis leaves the Hunters to pursue a monster that has the potential to destroy Olympus. She is trapped by Atlas and is forced to hold up the sky. She is rescued by Percy who holds the sky for her so she can fight Atlas. Artemis and Percy trick Atlas into holding the sky again
. Artemis transforms Zoe into a constellation after she is killed in battle. She seems to like Percy, saying that he's okay for a boy, and later refers to him as a man. She speaks up for Percy, Annabeth and Thalia at the Council of the Gods and votes for Percy to live. Thalia joins her hunt at the end of The Titan's Curse, preventing her from fulfilling the Oracle's prophecy. Artemis did not follow Zeus' order to not have contact with mortals by still communicating with her Hunters. Thalia states, "Artemis follows her own rules," even though she does this without Zeus' knowledge. She sent Thalia to find Jason, her long-lost brother.
Athena/Minerva - The Goddess of Wisdom and Battle Strategy. She first appears in The Titan's Curse, where she is shown to dislike Percy and his relationship with Athena's daughter, Annabeth. Athena is described as being beautiful but also serious and foreboding. She has intense grey eyes, as do almost all of her children who reside in Cabin 6. In The Demigod Files, she has black hair, but in other books, she is depicted as having blonde hair, like her children. Athena considers Percy to be very dangerous as he has the potential of fulfilling the Prophecy that a child of one of the Big Three will destroy Olympus. She advises Percy that wise counsel is not always the most popular, and cautions him about his fatal flaw. She also votes not to let Percy live. Percy considers Athena one of the most dangerous beings he has encountered, noting that because of her calculating intelligence, her plans rarely fail.
Demeter/Ceres - The Goddess of the Harvest. She is first mentioned in The Sea of Monsters, when Hermes is talking to Percy about the quest. She was also one of the goddesses who voted to keep Percy alive in The Titan's Curse. Demeter made three brief appearances along with her daughter Persephone in The Last Olympian, notably when she participates in the battle against the Titans. Her children reside in Cabin 4.
Dionysus/Bacchus - The God of Wine and Madness. He is Percy's cousin and the father of Castor and Pollux. He is the director of Camp Half-Blood where he was sent by his father Zeus for chasing an off-limits nymph though he is married. At Camp Half Blood, he is known as "Mr. D." He is shown to hate his job and have a low opinion of demigods stemming from Theseus' abandonment of Ariadne, but he has to remain at Camp Half-Blood for another fifty years (his punishment used to be 100 years, then Zeus shortened it). His children live in Cabin 12. He can be seen playing with the satyrs in camp. He appears in all the books. In The Battle of the Labyrinth, he goes out to search for the minor gods and returns at the end of the book. He rarely bothers to call the campers by their proper names, making a point of calling Percy Jackson names such as "Peter Johnson", "Perry Johannson", or "Pierre Jorgenson" throughout the series
. He also calls Annabeth "Annie Bell" or "that Anne girl", regardless of the fact that she has been in Camp Half-Blood since she was seven years old. Though he has said that Percy "always manages to annoy him," he has saved Percy's and Annabeth's life several times.
Hades/Pluto - The God of the Underworld, son of Kronos, brother to Poseidon and Zeus. He is the husband of his niece Persephone and is Nico and Bianca di Angelo's father. Percy first encounters him in The Lightning Thief on his quest to find and return Zeus's master bolt. In The Last Olympian, Hades traps Percy when Nico leads him to the Underworld palace. He plans to put him in the dungeon until Nico turns sixteen, so Nico can fulfill the prophecy. He appears again with Persephone and Demeter to save Olympus. After the war, Hades, along with the minor gods, is given a cabin in Camp Half- Blood
Hephaestus/Vulcan - The Gods' Blacksmith and God of Fire. He appears as a minor character in The Titan's Curse and as a major one in The Battle of the Labyrinth where he helps Percy numerous times. His children reside in Cabin 9. He is the father of Charles Beckendorf and Leo Valdez. He was thrown off of Mount Olympus when he was born because Hera thought he was hideous and wanted a "perfect" family, though Hera denies it. Hephaestus says that Hera likes telling the story that Zeus threw him off the cliff because "it makes her seem more likable." He defied Zeus' rule in The Lost Hero and spoke to his son. He also took the head of Festus to Bunker 9 for Leo.
Hermes/Mercury - The Messenger of the Gods and the God of travelers, Communication, and Thieves. He has nearly no role in the first book but is a significant character in the second book where he helps Percy by giving him a flask full of air, backpacks, and his special multi-vitamins, hoping that he will be able to rescue his son, Luke, who had joined the Titans. He is also mentioned briefly in The Titan's Curse. He is bitter about Luke's situation and gets angry at Annabeth in The Last Olympian for not saving him when she had the choice. All of his children and any half-bloods of undetermined parents stay in Cabin 11.
Hestia/Vesta - The Goddess of Hearth and Home. She first appears as a young girl, about 8 years old, who wears a simple brown dress and scarf. Percy sees her when he enters Camp Half-Blood for the first time, but does not speak to her. Percy and Nico encounter her in The Last Olympian when she gives them food. She has glowing eyes that remind Percy of a cozy fire. Hestia tends to the hearth in Olympus while the other gods battle Typhon. Hestia gave up her throne for Dionysus in order to prevent a civil war among the Olympians. She explains to Percy that one of the greatest powers is to yield in order to retain peace. Percy offers Pandora's jar to Hestia, as she is the Last Olympian and Hope survives best at the hearth. Hestia accepts, preventing Percy from being tempted to open it. She later helps Percy when he battles Kronos by making her hearth painfully hot for Kronos when he reaches to get his scythe when it fell into the flames
. When Percy looks into her eyes, he can sometimes see the past or the future, like what happened before Annabeth, Thalia and Luke came to Camp Half-Blood.
Poseidon/Neptune - The God of the Sea, Earthquakes, Storms, and Hurricanes and the creator of the horse. He is Percy's father and his children (Percy's half-siblings) reside in Cabin 3. In the first book, he is suspected of having stolen Zeus's master bolt, but Percy proves the claim false. He appears as a minor character in the next three books. In The Last Olympian, Percy falls unconscious in the ocean and lands at Poseidon's castle. Poseidon is at war with Oceanus, the Titan god of the ocean, and makes Percy go back to camp instead of helping him. He is one of the few gods that does not go and help in the effort to defeat Typhon until Percy tells him that the only way to win is to abandon the sea and fight Typhon. His symbol of power is the trident
Minor gods
 Aeolus - The custodian of the Four Winds. They never made an appearance, but they were mentioned in The Last Olympian. They made it hard for the Titan army to hit Olympus by air. Consequently, it also made it harder for Pegasi to fly. In "The Lost Hero," Aeolus is shown to have gone crazy filling out the gods' weather requests and wants Zeus to make him a god.
 Amphitrite - The Queen of the Seas, wife of Poseidon, and daughter of Oceanus. In The Last Olympian, Amphitrite alongside Triton is seen talking strategy with her husband Poseidon in the throne room of their ocean floor palace. Percy Jackson joins them and Amphitrite treats him coldly as he is a reminder of Poseidon's unfaithfulness. Percy expects nothing else and feels sorry for her as she does not have a faithful husband. She is worried about how her father is attacking and how Poseidon is losing power to the Titan of the Sea. Amphitrite is a beautiful goddess, with flowing black hair and small horns like crab claws.
Boreas - The God of the North Wind. In The Lost Hero, Jason, Piper, and Leo meet him in his palace when they come to him for help.
 Boreads - Calias and Zethes are the sons of Boreas. In The Lost Hero, they are seen when Jason, Piper, and Leo arrive at Boreas' palace.
 Deimos - The God of Terror and the son of Ares. He appears in "Percy Jackson and the Stolen Chariot" in The Demigod Files. Deimos and his brother Phobos steal Ares' war chariot from Clarisse. Percy and Clarisse have to get it back to Ares before sunset. On the way, Deimos comes in front of the ferry that Percy and Clarisse are on while riding a sea serpent. He comes back later in the zoo, terrorizing Clarisse by shape-shifting into Ares and yelling at her. Clarisse deduces his true identity and defeats him.
East River - The minor God of the East River. He only appears in The Last Olympian. He dislikes Percy and the Hudson River. Percy asks him to sink all of the Titan ships that come in his river, and splits the sand dollar his father gave him for his fifteenth birthday with East River and Hudson so they both agree to his request.
 Hebe - The Goddess of Youth. She was mentioned in a few of the books in lists of which minor Gods had turned over to the Titans' side.
 Hecate - The minor Goddess of Magic. Hecate helps Kronos in The Last Olympian by attacking Olympus and making cars stay away from Manhattan. She is the mother of C.C. (Circe), who turns Percy into a guinea pig in The Sea of Monsters. She is the ruler of the empousai, two of which attack Percy in The Battle of the Labyrinth.
Hudson River - The minor God of the Hudson River. He first appears in The Last Olympian. He dislikes Percy and East River. Percy asks him to sink all of the Titan ships that come in his river, and splits the sand dollar his father gave him for his fifteenth birthday with East River and Hudson so they both agree to his request.
 Hypnos - The God of Sleep and father of Morpheus. In "The Lost Hero," it shown that Hypnos has his own cabin. Clovis is one of Hypnos' sons.
Iris - The Goddess of Rainbows. She helps people deliver messages through Iris messages. Percy uses Iris messages a lot throughout the series by finding a rainbow and asking Iris to accept his offering. He then throws a golden drachma into the rainbow, says the name of the person he would like to contact and where the person is, and then he can see and talk to the person. Iris specializes in delivering messages through rainbows. She does not appear in the series, but later on gets her own cabin at Camp Half-Blood. In The Lost Hero, she is revealed to be the mother of Butch. Iris is said to be on good terms with Chiron and Hermes.
Janus - The God of Gates, Doorways, Beginnings and Endings. He appears as a minor character in The Battle of the Labyrinth where he offers Annabeth a choice between two doors, which represents the situation she was in when she had to make the decision about saving Luke's soul. He has two faces, and each face seems to think the exact opposite of what the other face thinks. He is also mentioned when Percy Jackson has a dream of Deadalus. Janus makes him choose to become a murderer, which he must bear a burden for as long as he lives.
 Khione - The Goddess of Winter and daughter of Boreas who appears in The Lost Hero. Jason, Piper, and Leo encounter her in Boreas' palace. She ends up betraying them to help Gaia in her conquest.
 Morpheus - The God of Dreams[son of Hypnos]. He appears in The Last Olympian, putting all mortals to sleep in Manhattan before Kronos's army invades Olympus. He also puts Grover to sleep for two months, after he tries to defend the forest of Central Park.
Melinoe - The Goddess of Ghosts. She lives in the Underworld. Half of her is pale chalky white and the other half is pitch black. She appears in The Demigod Files in the short story "Percy Jackson and the Sword of Hades". She scares people by showing them the ghosts of deaths they regret. She shows Thalia her mother and Nico his mother. Percy does not have any ghosts because he has made peace with them.
 Nemesis - The Goddess of Revenge and Balance. She never makes any actual appearances in the books, but she is the mother of Ethan Nakamura who appears in The Battle of the Labyrinth and The Last Olympian. Ethan mentions her in both The Battle of the Labyrinth and The Last Olympian.
 Pan - A Satyr who is the God of the Wild. Satyrs have been looking for him for two thousand years. He appears in The Battle of the Labyrinth. Once Percy and the others find Pan in The Battle of the Labyrinth, Pan dies peacefully.
Persephone - The Goddess of Springtime and Queen of the Underworld. She is married to Hades. Her parents are Demeter,and Zeus. Hades only allows Persephone to visit her mom in the spring and summer. Unlike most minor Gods, Persephone fights with the Gods during the battle against the titans. Persephone appears in The Demigod Files and The Last Olympian. She is notably much kinder and more beautiful in the spring and summer.
 Phobos - The God of Fear and the son of Ares. He appears in Percy Jackson and the Stolen Chariot in The Demigod Files. Phobos and his brother Deimos steal Ares's war chariot from Clarisse. Then Clarisse and Percy have to find it. Phobos has the power of showing people their greatest fears. He shows Percy his greatest fear, which is Camp Half-Blood catching on fire and burning, when they are fighting in an aquarium in a zoo. The word "Phobia" was named after him.
Pompona - The Roman Goddess of Plenty. A statue of her on top of a hotel comes to life in The Last Olympian. She becomes upset with Percy when he thinks she is Demeter. She is also cranky because all of the demigods who walk into the hotel ask her to watch their possessions. She is on the side of the Titans.
 Thanatos - The God of Death. In The Demigod Files, King Sisyphus made a reference to him when Percy, Nico, and Thalia visit him.
 Triton - The Sea Messenger God and the son of Poseidon and Amphitrite. He is depicted as a mermaid with two fish tails. In The Last Olympian, Triton was with his parents talking strategy revolving on Oceanus' war on Poseidon. He is shown to be cold and arrogant to Percy, but respects Tyson.
 Tyche - The Goddess of Fortune. At Camp Half-Blood, her children reside in Cabin 19. According to Rick Riordan's website, Tyche is the most difficult Goddess to find.
Titans
 Aigaios - The Titan of Sea Storms. Like Oceanus, he did not fight in the first war. In The Titan's Curse, Aigaios was mentioned by Tyson to be assisting Oceanus in protecting the Princess Andromeda from Poseidon.
 Atlas - The Titan General. He is the father of Zoe Nightshade and her sisters, the Hesperides. He was imprisoned in San Francisco upon a mountaintop, forever cursed to uphold the sky. He escaped briefly during The Titan's Curse but was cleverly subdued by Artemis and Percy. He is the father of Calypso and Zoë Nightshade.
 Helios - The Titan of the Sun and son of Hyperion. In The Titan's Curse, Apollo mentioned that he and Selene faded due to the Romans being too lazy to build their temples and make sacrifices to them.
Hyperion - The Titan of Burning Light and father of Helios and Selene. He appears only in The Last Olympian in a battle against Percy. Hyperion has a very fiery temper and dresses in full golden armor. He was defeated by Grover Underwood and trapped within a giant maple tree.
 Iapetus - The Titan of Mortalilty, Pain and Death. He accompanies Ethan Nakamura in the Underworld in an attempt to steal the Sword of Hades in The Demigod Files. Percy drags him into the River Lethe and brainwashes him. Percy then tells him he is Bob the Titan.
 Krios - Krios is the Lord of the South and the Titan of Stars and the Constellations. He is only mentioned in one of Percy's dreams, where he is forced to babysit Atlas. He is dissatisfied with his condition because he only wears ram horns, but Hyperion can blow up into flame. He is also mentioned fleeing when Kronos was defeated. He wears armor that has glowing stars on it. In The Lost Hero, Jason mentions that he defeated Krios with his bare hands.
Kronos - The Lord of the Titans and the main antagonist of the first series. He is the father of Zeus, Poseidon, and Hades, Chiron, and grandfather of Percy. He tries to get Percy to join him and fight against the Olympians. His weapon is a scythe, a "six-foot-long blade curved like a crescent moon" as said in The Battle of the Labyrinth. It is hinted in the book that it is Luke's old sword Backbiter remade into the scythe. He is the father of the "Big Three," which are Zeus, Poseidon, and Hades. He is also the father of Demeter, Hera, Chiron and Hestia. He was sent to Tartarus by his sons and is reforming in The Sea of Monsters, The Titan's Curse, and The Battle of the Labyrinth. When he eventually reforms himself, he takes matters in his own hands. The only reason Luke was not killed was because of his loyalness to Kronos. In The Battle of the Labyrinth, Kronos is delayed to attack Camp Half-Blood. In the fifth book, Kronos leads the Titans to Olympus while the gods were fighting with Typhon
. Later, Annabeth and Percy save Luke, and Luke sacrificies himself.
Oceanus - The Titan of the Ocean. In this series, Oceanus is often depicted as having the upper body of a muscular man with a long beard and horns (often represented as the claws of a crab), and the lower torso of a serpent. He did not fight the Olympians in the first war, but in The Last Olympian, he joins Kronos and is at war with Poseidon. Oceanus joins the side that he thinks will win. After it becomes clear that Kronos had lost the battle, he stops fighting Poseidon and escapes back to the depths of the ocean.
Prometheus - The Titan of Forethought (and as Grover says, "Crafty Counsel", with emphasis on "Crafty"). He appeared in The Last Olympian, where he gives Percy Pandora's Box (or Pandora's pithos) which contains the spirit Hope. He fought with Olympians in the first war, then switched sides in the second war because he was sure the Titans would win. He is otherwise neutral, as he always tries to pick the winning side. After Kronos was defeated, he is mentioned to have run away and has sent a list of excuses to the Big Three.
 Selene - The Titan of the Moon and daughter of Hyperion. In The Titan's Curse, Apollo mentioned that she and Helios faded due to the Romans being too lazy to build their temples and make sacrifices to them.
Giants
 Enceladus - A Giant who was the first to be awakened in The Lost Hero. He was killed when Jason and Jupiter threw lightning at him.
 Porphyrion - A Giant who was the second to be awakened in The Lost Hero. He fought Jason and his friends and was teleported away before Hera could finish him off.
Immortals
 Calypso - Calypso first appears in book four. She nurses Percy back to health on her island. She is shown to be in love with Percy, and is heartbroken when he leaves. She is cursed with this as punishment because she supported her father, Atlas, the Titans in the first war. Near the end of The Last Olympian, she is freed from her punishment as part of Percy's wish. She is immortal and lived on an island that makes anyone who lives there immortal for the time of their stay, though once they leave they can never come back.
 Charon - Charon is the Underworld carrier through the River Styx. Percy and his friends meet him in The Lightning Thief.
 Chiron - In the series, he plays the part of the mentor and activities director to the main protagonist Percy Jackson and the other demigods residing at Camp Half-Blood. In the first book, he appears under the pseudonym of Mr. Brunner. Later, it is revealed that he is the son of Kronos. Chiron is a centaur; his horse half is a white stallion.
Eurytion - A worker of Geryon and the owner of Orthrus. He is usually seen with a huge club. He is a son of Ares. He is unenthusiastic about and later rebellious against working for Geryon. When Geryon is defeated, he starts planning to take over the Triple G ranch. He gives Annabeth a mechanical spider to find Hephaestus.
 Phoebe - The best tracker of Artemis' hunters. She hit the Stoll brothers with arrows in a game of Capture the Flag. She was supposed to go on the quest inThe Titan's Curse, but the Stoll brothers (at the request of Aphrodite) gave her a poisoned (but non-lethal) shirt that prevented her from going. Percy ended up replacing her. She appears in The Lost Hero. The incident with the Stolls appears to have had a lasting effect on her; she appears to think that every boy wants to play a prank on her.
Zoë Nightshade - The lead Huntress of Artemis. She is a daughter of the Titan General Atlas and the sea goddess Pleione. Percy later discovers she made his magic blade, Riptide. She uses a hunting knife and a bow as her weapons. She is a former Hesperide. but was blotted from history for aiding the half-blood Hercules in slipping past the dragon Ladon and obtaining a golden apple. Ultimately, a combination of Ladon's poison and her father's attacks kill her. In remembrance of her sacrifice, Artemis turns her into a constellation, "The Huntress."
Demigods
  Bianca di Angelo - A daughter of Hades, Nico's older sister, Percy, Thalia and Jason's cousin and later, a Huntress of Artemis. After Artemis is kidnapped in The Titan's Curse, she undertakes the quest to rescue her alongside Percy Jackson, Grover, Thalia Grace, and Zoë Nightshade. She sacrifices her death and harbors hard feelings for him for a while afterward.
 Butch - The demigod son of Iris who first appears in The Lost Hero. He is the counselor of the Iris Cabin. It is said he is the best equestrian at camp.
 Castor - The son of Dionysus and the twin brother of Pollux. Castor died at age 17 during the Battle of the Labyrinth when he was stabbed in the arm and hit on the head by an enemy demigod.
Charles Beckendorf - A son of Hephaestus, known to be able to build almost anything. He is lead counselor for Cabin 9. He had a minor role in the first four books in the series, but has a larger role in The Last Olympian. He has a crush on Silena Beauregard, whom he starts dating from the short story The Bronze Dragon contained in The Demigod Files. Most members of Camp Half-Blood call him by his surname, Beckendorf. He sacrifices himself at the beginning of The Last Olympian to destroy the Princess Andromeda, a ship that was Kronos' headquarters, unaware that it was actually because of Silena (a spy on the camp) that he lost his life.
 Christopher - The demigod son of Hephaestus who first appears in The Lost Hero.
Chris Rodriguez - A half-blood son of Hermes (as shown in "Percy Jackson and The Olympians The Ultimate Guide") who had gone to Kronos's side until having gone completely insane in the Labyrinth. Clarisse finds him and brings him to camp where Dionysus makes him sane again. He later has a relationship with Clarisse.
Clarisse La Rue - One of the children of Ares and the head of Cabin 5. She is hot-tempered, arrogant, big, tall, strong, and is known to dislike Percy. Despite her brash nature, she is capable of compassion, shown when she cares for Chris Rodriguez, a half-blood who became a traitor and was later found crazed and stumbling within the Labyrinth in a bout of madness. She is later seen holding Chris's hand at a campfire after Dionysus cures him of his madness. She later befriends Silena Beauregard, apparently after Silena gives her advice on her first boyfriend. She and her cabin later fight with the Apollo cabin over a flying chariot. Later, she prevents Cabin 5 from joining in the battle of Manhattan because of the chariot fight, though Michael Yew gives it to them. Silena later impersonates her to bring the Ares cabin into the battle by taking her armor and spear. Silena is killed by a drakon during this charade
. To avenge her friend, Clarisse  stabs the drakon in the eye, breaking her spear and electrocuting the drakon. She then runs at Kronos's armies, appearing to be as invulnerable as Percy, even though she does not have the Curse of Achilles. Percy recognizes that an aura around her highly resembles that of Ares when Percy fought him. Thalia remarks that it is a blessing of Ares and that she has never seen it before in person. She is later frozen by a giant, and, after thawing, is welcomed to Olympus by her father, who is very proud of her.
Clovis - The demigod son of Hypnos who first appears in The Lost Hero, where he tries to help Annabeth on how Jason Grace's memory was lost. He is the counselor of the Hypnos Cabin.
 Connor Stoll - One of the children of Hermes. He is brothers to Travis Stoll. Both are known to be crafty and mischievous. He and his brother's shenanigans incapacitated a member of Artemis's Huntresses, which enabled Percy to join the quest of The Titan's Curse. He and his brother have a larger role in The Last Olympian and both survive. He and his brother head Cabin 11 after Luke goes over to Kronos.
 Drew Tanaka - A demigod daughter of Aphrodite who first appeared in The Lost Hero. She was the Cabin counselor after Silena, but was forced down by Piper McLean. She is vain and sarcastic, and can also charmspeak.
Ethan Nakamura - A son of Nemesis who feels that his mother is unappreciated and fights for her. She took his eye in return for the promise that Ethan would change the world. He turned to Kronos' side after Percy saved his life by letting him live after a duel. After the duel, he pledges himself to Kronos, the last half blood needed for his resurrection. In The Last Olympian, he tries to stab Percy in the small of his back (his Achilles spot), but Annabeth leaps in front of the dagger, and Kronos believes that he tried to stab Percy's Achilles spot. He is in the truce party along with the Empousa queen and Prometheus. Ethan later figures out that the small of Percy's back was his Achilles spot, but instead of killing him, he tries to kill Kronos. Kronos laughs, and kills him easily. Ethan's last words were "Deserve better...if they the minor gods just...had thrones..."
 Harley - A demigod son of Hephaestus who first appeared in The Lost Hero.
Jake Mason - A son of Hephaestus. He becomes the head of Hephaestus' cabin after the death of Charles Beckendorf in The Last Olympian. He fights in the war between the gods and Titans. He later steps down and gives the role to Leo. In The Lost Hero, he was seen in a body cast after trying to catch Festus. He resigned after Festus led Leo to Bunker 9.
 Katie Gardner - A daughter of Demeter that is the head counselor for cabin four at Camp Half-Blood, as seen in The Last Olympian. Miranda Gardiner is her deputy taking over in winter because Katie is not a year-rounder. She fights in and survives the war between gods and titans. Katie strongly dislikes the Stoll twins, because they once put chocolate Easter bunnies on the Demeter cabin's grass roof. She is the cousin of Percy Jackson, Thalia Grace, Nico di Angelo and Bianca di Angelo.
 Lacy - Lacy is a daughter of Aphrodite who befriends Piper McLean in "The Lost Hero".
Lee Fletcher - A son of Apollo. He was the original head of Cabin 7 before he was killed by a giant in The Battle of the Labyrinth.
 Lou Ellen - Daughter of Hecate, who was first mentioned in The Lost Hero. She is known for playing magical tricks on fellow campers.
 Malcolm Pace - A son of Athena. He is the assistant counselor of the Athena cabin. He leads Athena's cabin to a bridge or tunnel in The Last Olympian. His last name is never revealed. He walks in on Percy and Annabeth hugging in The Battle of The Labyrinth.
 Mark - A son of Ares. He is mentioned by Percy once in The Demigod Files in the short story Percy Jackson and the Stolen Chariot when Percy asks Clarisse which of her brothers played a prank on her. He may have been the one that Percy awoke from a midday nap in The Titan's Curse.
Michael Yew - A son of Apollo. He is the leader of the Apollo Cabin after Lee Fletcher died in The Battle of the Labyrinth. He is described as very short, four foot six, with personality that makes up for his height, and a face that reminds Percy of a ferret. In The Demigod Files, in an interview with Clarisse, she mentions that she would want to pulverize Micheal, thus stating that they are enemies. Percy finds it very interesting that he's the counselor. He is supposedly killed leading a group of demigods in the fight against Kronos' army. Percy looked everywhere for him, but only found his bow. He is presumed deceased, although this was never confirmed.
 Miranda Gardiner - Miranda is a daughter of Demeter who first appears in The Lost Hero and is the counselor of her cabin. Miranda had her nose (temporarily) removed by Lou Ellen, a daughter of Hecate.
 Mitchell - Mitchell is a son of Aphrodite who befriends Piper McLean in "The Lost Hero".
 Nyssa - Demigod daughter of Hephaestus.
Pollux - The son of Dionysus and the twin brother of Castor. He and his brother are described as blond, athletic, plump faced and good looking. He fights and survives the war between the Titans and the Gods, making his father secretly happy.
 Reyna Avila Ramírez-Arellano - A Roman demigod, mentioned by Jason in The Lost Hero who might be his girlfriend at the Roman camp.
Silena Beauregard - A daughter of Aphrodite and the head of Cabin 10. Percy regards her as one of the nicer girls of the cabin and acknowledges that she is pretty, but still finds her to be a "neat freak". She participates in the Battle of the Labyrinth. She does not think that she is a good fighter and feels that she does not do anyone any good at camp. She unveils her hatred towards the hunters of Artemis, who say that love is worthless, to which she responds by stating that she is going to "pulverize" them. Silena is killed by a drakon when she fights it while pretending to be Clarisse in The Last Olympian. It is also revealed in The Last Olympian that she was the spy giving Kronos information about what was going on at Camp Half-Blood. When the Stoll brothers ask Percy about it, he will not let Silena be remembered as a spy
. She did, however, want to stop being the spy when her boyfriend Charles Beckendorf died (charming her with his looks, Luke had promised that fewer lives would be lost and that Charles would be safe), but was blackmailed by Luke when he threatened to reveal her betrayal. This causes Silena to become even weaker or as Percy described, "She looked like glass. Like she was going to break at any time." Percy also notes that no one says the word "spy" during the burning of her shroud (which was hot pink with an electric spear embroidered on it).
Sherman - A son of Ares. He, like Mark (another son of Ares), is mentioned by Percy in The Demigod Files in the short story Percy Jackson and the Stolen Chariot, when Percy asks Clarisse which of her brothers played a prank on her. He also may have been the one that Percy awoke from a midday nap in The Titan's Curse.
 Travis Stoll - One of the children of Hermes. He and his brother become the new counselors of cabin 11 after Luke went to Kronos. Travis is the older brother of Connor Stoll. Both are known to be crafty and mischievous. Percy finds it ironic that their last name is Stoll, like the word 'stole'. His and his brother's shenanigans incapacitated a member of Artemis's Huntresses, which enabled Percy to join the quest of The Titan's Curse. He and his brother have a larger role in The Last Olympian and both survive.
 Will Solace - He is a son of Apollo whom Percy took to heal Annabeth in The Last Olympian and become the leader of the Apollo Cabin as seen in The Lost Hero.
Mythological Characters
Some of the known characters of Greek Mythology have made an appearance in this series:
Achilles - The image of Achilles appears briefly in The Last Olympian, warning Percy about The Curse of Achilles.
 Ariadne - Ariadne once helped Theseus when it came to him slaying the Minotaur. When Theseus unknowingly left Ariadne on an island, she was found by Dionysus who took her on as his wife. Theseus "abandoning" Ariadne was one of the reasons why Dionysus dislikes heroes. Ariadne made an appearance at the end of "The Titan's Curse" where she was walking arm to arm with Dionysus.
 Circe - Circe ran a magical beauty boutique in the Sea of Monsters. She was glamorous and went by the alias of C.C. While she treated females at her spa, she turned males into guinea pigs. When Percy was turned into a guinea pig, Annabeth managed to use Hermes' multivitamins to become immune to Circe's spells and escaped with the guinea pigs. Not knowing which one is Percy, Annabeth fed them all multivitamins restoring Circe's victims to normal.
Daedalus - Inventor of the Labyrinth, son of Athena, and father of Icarus. Daedalus killed his nephew Perdix and took his notes, which he then used to cast his animus (soul) into automatons after Athena branded him with the murderer's brand. He originally owned a hellhound named Mrs. O'Leary and fights the Titan army toward the end of the fourth book. He later decides that it is time to go to the Underworld and leaves Annabeth his laptop which is filled with his notes and ideas. Nico unleashes Daedalus' spirit which destroys the labyrinth. When in the Underworld, King Minos tried to convince the other judges to punish him and fails. Daedalus' spirit now works as the Underworld's architect while being able to visit Icarus and Perdix on weekends.
 The Fates - The three women who control the threads of life.
 Clotho - The Fate who spins the Thread of Life.
Lachesis - The Fate who measures the Thread of Life. In "The Lightning Thief," Percy and Grover encounter them at an old-fashioned fruit stand. In "The Last Olympian," the Fates take Luke's dead body away after the Second Olympian War.
 Atropos - The Fate who cuts the Thread of Life.
 Gaea - The embodiment of Earth, the mother of the Titans, Giants, and Antaeus, and grandmother of the Olympian Gods. She serves as the primary antagonist of The Heroes of Olympus series.
 King Lycaon - King Lycaon was a king who was turned into a wolf after doing deadly tests on Zeus. In "The Lost Hero," King Lycaon appears where he meets Jason, Leo, and Piper in their search for Aeolus. He and his werewolves were instructed to kidnap Jason and kill Leo and Piper. King Lycaon escaped when the Hunters of Artemis stopped him.
King Midas - King Midas was a king who had the Golden Touch. He was referenced in "The Battle of the Labyrinth" where he states that Rachel's gold appearance made her look like she was touched by King Midas. In "The Lost Hero" King Midas was among the dead people brought back to life when the Doors of Death opened in Omaha, Nebraska. When Jason, Piper, and Leo arrived at Midas' mansion, he was polite. Midas told them that it was a silly story that he learned his lesson when he touched his daughter, turning her into solid gold. Midas touched Piper's backpack, turning it into flexible gold and making it magic, proving he still had the magic touch. Midas admitted that he had sometimes pat his son Lityerses on the pack accidentally, but he always had the lake to rinse it off. Midas finally revealed he was working for the Giants and turned Leo and Piper into gold. He gave Jason a choice: turn into a nice gold statue for his collection or fight Lityerses and die. Jason fought Lityerses and Midas
. Midas and his son fought off the Hunters of Artemis before Jason managed to defeat Lityerses and unfreeze Piper and Leo.
King Minos - King Minos is a former king who is one of the Judges of the Underworld. Nico summons in book four where he pretends to advise him on how to bring Bianca back from the dead he is when really trying to bring himself back. He is also seen as a live king in Percy's dreams/flashbacks. Near the end of the book, it is revealed that he is serving his own dark purpose when he kidnaps Nico and tries to kill Deadalus and use his knowledge. When Daedalus ends up in the Underworld following his sacrifice, King Minos tried to convince the other two judges to punish him and fails.
King Sisyphus - A former ruler of Corinth. He had committed violations of guest hospitality, seduced his niece, plotted to kill his brother Salmoneus, and told the River God Asopus where Zeus had his daughter. His major crimes involved cheating death twice. The first where he tricked Thanatos into showing him how the chains worked causing Thanatos to be trapped until Ares freed him (Thanatos being trapped displeased Ares since no one in battle could die). The second time was when he complained to Persephone that his wife Merope did not give him a proper funeral and sent Sisyphus' spirit to the living. Even when Sisyphus did not want to return to the Underworld, he was forcefully dragged back there by Hermes. His punishment in The Fields of Punishment was to roll a boulder up a hill, and whenever he failed he would be tempted to try again. He appears in The Demigod Files in the story titled The Sword of Hades when Percy and Nico ask him advice while Thalia rolls the boulder up the hill
. He does not really help them much, but he does say that he helped someone else. He said that he told that other person to go see Melinoe. Therefore, Percy and his friends go to see Melinoe as Sisyphus begs for them to set him free from his punishment as being here was a minor set-back.
King Tantalus - Tantalus is a king from the Fields of Punishment who is the son of Zeus. He ended up there after killing his son Pelops, cutting him up, and serving him as food to the Gods. His punishment in the Fields of Punishment was to stand under a fruit tree in the middle of a lake where the branches and water would go out of reach from him. He becomes the activities director at Camp Half-Blood after Chiron is fired. He appears in The Sea of Monsters as a minor character. Even when hired as the activities director, he could not eat or drink as the food kept evading him. He is shown to hate Percy and his friends even more than he hates most half-bloods, yet shows favoritism to Clarisse such as naming her hero when the camp was attacked by Colchis Bulls or when she wins the chariot race. He throws a banquet in her honor
. When the camp is attacked by a large flock of Stymphalian birds, Tantalus blames it on Percy, Annabeth, and Tyson's "bad chariot driving" despite that they were the ones who defeated the birds. When Tyson is brought to camp, Tantalus insults and makes fun of him even when Tyson is claimed by Poseidon. When at the end of the book, his curse is lifted by Dionysus just before he is sent back to the Underworld as he attempts to take some food along. Though none of the campers were sad to see him go.
Lityerses - Lityerses is the son of King Midas. In "The Lost Hero," he appeared alongside his father.
 Medea - A sorceress and granddaughter of Helios that Jason, Piper, and Leo encountered in "The Lost Hero." She is shown as the head of a mall in Chicago that Jason, Piper, and Leo visit. She begins to show the demigods her stock of magic objects and potions, but becomes angry when she hears Jason's name (as he is named after the hero that betrayed her). It quickly becomes evident to Piper that Medea is an agent of Gaia, and the one who Hera had warned them about. Jason and Leo however are entranced by the magic in Medea's voice who tells them to attack and kill one another. Piper managed to bring the two to their senses and they blew up the mall. Medea shouts that she will not be abandoned again causing the three to quickly leave before she makes another attempt to destroy them.
Oracle of Delphi - Apollo's Oracle of Delphi used to reside in the mummified remains of its host until its power was transferred to Rachel Elizabeth Dare in The Last Olympian. The Oracle's power originally passed from the deceased oracle to a newly chosen oracle; however, at the end of the second world war, the oracle gave a Great Prophecy predicting a child of the Big Three (Zeus, Poseidon, and Hades) would determine whether or not the gods would be preserved or destroyed. Using this information, the Big Three entered a pact in which none could continue to sire heroes. Before this, Hades bore two young children, Nico di Angelo and Bianca di Angelo. Zeus, fearing that either were the children of the prophecy, destroyed the hotel where the di Angelos lived with his master bolt, killing Maria di Angelo, Hades' lover. In revenge, Hades cursed the Oracle to ensure that the power of the Oracle of Delphi would not pass on to somebody else in hopes that it would soon return to the dust along with its  prison
. After the Battle of Manhattan in which Hades and Nico successfully assist in the defense of Mount Olympus, Zeus honors the Lord of the Dead. In response to his newfound respect from the other gods, he lifts the curse, allowing the Oracle's power to pass on into Rachel Elizabeth Dare, the last Oracle.
Procrustes - He is depicted as "Crusty," the owner of a Los Angeles mattress store who appears in The Lightning Thief. He trapped Annabeth and Grover on his bed, but he was defeated by Percy.
 Theseus - When Nico was trying to summon  Bianca in "The Battle of the Labyrinth," he ended up summoning the spirit of Theseus.
Creatures and Monsters
 Antaeus - A half-giant who is the son of Poseidon and Gaia. He remained strong while he was on the ground. Percy managed to find a way to get him into the air and defeat him.
 Argus - Argus is a multi-eyed humanoid who works as a security guard at Camp Half-Blood. He is said to have an eye on this tongue which is why Argus does not talk much.
 Automaton - Automatons are like robots, but more highly developed. They have an intricate circuitry in them which makes them hard to fix. Most are made out of normal steel but some like the Bronze dragon are made out of celestial bronze. According to Annabeth, some Automatons in Manhattan were used to either attack or help defend Mount Olympus.
 Bear Twins - Agrius and Oreius are humanoid bears that were a result of a union between a woman and a bear due to the power of Aphrodite. The two served as Luke's henchmen in The Sea of Monsters.
Bronze Dragon - A dragon made of bronze that created by the campers in Hephaestus' cabin to help defend Camp Half-Blood. He is later named "Festus" by Leo Valdez. He is also shown in The Bronze Dragon of The Demigod Files. Festus means Happy in Latin.
 Centaur - Half man, half horse. Chiron is a centaur.
  Party Ponies - They are Chiron's kin. As their name suggests, they are a vast clan-like extended family of rowdy centaurs who reside in the United States with chapters hailing from each respective state. They are key players in two major incidents in the series. In The Sea of Monsters, they along with Chiron rescue Percy from Luke during their duel on the Princess Andromeda. In The Last Olympian, they help Chiron and the others fight the major battle between the gods and the Titans.
Cerberus - The three-headed dog who guards the Underworld entrance to the living. In The Lightning Thief, he befriends Annabeth. He also appears in The Last Olympian when he is playing with Mrs. O'Leary. He is the son of Echidna and Typhon.
 Charybdis - One of the two monsters (the other being Scylla) that live on either side of a narrow channel of water. She takes the form of a giant mouth that swallows and releases water, creating whirlpools.
 Chimera - A three-headed beast that is part lion, part goat, and has a snake-headed tail. It is first seen in the form of a Chihuahua. It confronted Percy atop the St. Louis Arch alongside its mother, Echidna. Overwhelmed by the creature and poisoned by its snake head, Percy was forced to jump into the water far below to escape it. It disappeared after Percy dove into the water.
Clazmonian Sow - A flying pig that appeared directly after Hyperion was defeated. Percy defeats it with the help of Blackjack, a statue of Hermes, and the New York Public Library's two stone lion statues.
 Colchis Bull - An elephant-sized, fire-breathing bronze bull created by Hephaestus. Their horns are silver and their eyes are rubies. In The Sea of Monsters, a bunch of them attacked Camp Half-Blood and are defeated by Tyson. They were later used to make the tracks for the Chariot Race.
 Cyclops - One eyed-giants who have three species as mentioned in The Lost Hero. The first are the elder cyclops, who are friendly, and help the gods, Tyson is one of them. The second is the southern species, who raise Goats and live in caves. Polyphemus is one of them. The third, introduced in The Lost Hero, is the northern group, who helped the Titans make weapons.
 Ma Gasket - A female cyclops who is the mother of Sump and Torque. She appears in "The Lost Hero" when Jason, Piper, and Leo visit her factory in Detroit.