Main Characters
Percy Jackson: A demigod son of the mortal Sally Jackson and the Greek god Poseidon. His mother, Sally, had also married a man named Gabe, who died. She married him to protect Percy, as his foul mortal odor would hide Percy from any monsters. Later, she marries a man named Paul Blofis, who she really loves. Percy is the main protagonist and first-person narrator in the Percy Jackson & the Olympians series, and appears in every book of the Camp Half-Blood chronicles. Percy is described as having a "Mediterranean" complexion, with jet black hair and his father's sea green eyes. The powers he inherited from his father include controlling water, control over boats and old sailing ships, making hurricanes, breathing underwater, and talking to horse-like animals and sea creatures. He is also a notably good swordsman. Throughout the series, Percy fights by using a ballpoint pen named Anaklusmos (Ancient Greek for "Riptide") that changes into a "celestial bronze" sword. Percy's fatal flaw is excessive personal loyalty, which he does not at first see as a danger.
Annabeth Chase: One of Percy Jackson's closest friends and later in the 'Titan's Curse 'his girlfriend, first appearing as a twelve-year-old who helps nurse him back to health after he fights the Minotaur. She is the daughter of the goddess Athena and mortal history professor Frederick Chase. Annabeth is tall and has blonde hair, stormy gray eyes, and tan skin. As a daughter of Athena, she is naturally intelligent and has a particular gift for strategy and architecture. At the end of The Last Olympian, she is assigned to redesign the damaged Mount Olympus. Her fatal flaw is hubris, or excessive pride. She is also described by her teacher Chiron as "territorial about her friends", which is manifested in several moments of jealousy and distrust. In The Lightning Thief, it is revealed that she is terrified of spiders, because of Arachne, whom Athena turned into a spider. She later becomes Percy’s girlfriend. Annabeth ran away from her father and stepfamily at age seven and encounters Luke Castellan and Thalia Grace. They live as runaways until they are found by Grover Underwood and taken to camp. Annabeth remains attached to Luke and convinced of his goodness even after his decision to support Kronos. Her main weapon is a short celestial bronze knife given to her by Luke. After losing it in The House of Hades, she uses a drakon-bone sword given to her by the giant Damasen. Annabeth also uses an invisibility Yankees cap from her mother and a magic shield.
Grover Underwood: A satyr, who is one of Percy's best friends. In the books, he has curly reddish-brown hair and fur, acne, and a wispy goatee. His horns grow larger as the series progresses, and he must take increasingly careful measures to hide them and his goat legs while posing as human. He is a vegetarian but also eats tin cans, furniture, and enchiladas. Grover is twenty-eight in the first novel, but because a satyr's lifespan is twice that of a human, he is still physically a teenager. Grover is a very sensitive and nature-conscious person. Like all satyrs, he can sense emotions and "smell" monsters and demigods. As the series progresses, his concern for his friends and pursuit of his goals lead him to take on leadership roles and become more sure of himself. Unlike his demigod friends, Grover is not an orthodox fighter. Instead, he uses reed pipes or a cudgel. He is first seen in The Lightning Thief, where he is disguised as a human student at Percy's school and serves as Percy’s "protector". Grover later reveals that if he completes a protector mission, he will receive his "searcher's license", and leave to look for the missing god Pan, his life's ambition. When Polyphemus captures him in The Sea of Monsters, he forms a psychic bond with Percy, called an empathy link, allowing them a limited degree of telepathic communication across great distances. He uses this ability to guide Percy to his rescue. He eventually finds Pan in The Battle of the Labyrinth, and receives the wild god's spirit. At the end of The Last Olympian, he is named a Lord of the Wild and given a seat on the satyrs' ruling council.
Nico Di Angelo: 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 son of Hades. Though he appears to be ten or eleven years old and therefore a violation of the "Big Three Oath", in reality he and his elder sister Bianca were born sometime in the 1930s, before Hades took the oath; and, after having their memories wiped, the two siblings stayed in the Lotus Hotel and Casino until the present day. Their mother was Maria di Angelo, daughter of an Italian diplomat. She was killed by Zeus, who was attempting to kill Nico and Bianca. He is a native of Venice, Italy and can speak Italian. Nico is initially depicted as cheerful and childish, with olive skin and dark hair, and enjoys playing Mythomagic (a Greek-mythology-themed card game similar to Magic: The Gathering). After Nico learns of Bianca's death, he becomes moody and secretive and often creeps all the other campers out. He becomes angry at Percy, who swore to protect his big sister, but in the end he forgave him. Afterwards, he becomes pale and shaggy-haired and begins wearing dark clothing. Nico, despite being very powerful, is extremely lonely, much like his father. He makes many other characters uncomfortable, in part due to his powers over darkness and death and his unnerving weapon of choice: a sword made of iron cooled in the Styx ("Stygian iron") capable of absorbing monsters' essences, rather than simply banishing them to Tartarus. Nico initially blames Percy for Bianca's death, but forgives him after learning that holding grudges is likely his fatal flaw. From this point on until meeting Cupid in The House of Hades, Nico struggles to hide his homosexuality, something he was raised to believe was completely inappropriate. During The Blood of Olympus, Nico's task was to transport the Athena Parthenos to Camp Half-Blood along with Reyna and Coach Hedge, to bring peace between the Camp Half-Blood and Camp Jupiter. Sometime after the end of The Blood of Olympus, he begins a relationship with Will Solace (Son of Apollo) after admitting to Percy that he had a crush on him. Nico's suggestion that Percy take on the curse of Achilles and his work to convince Hades to fight in The Last Olympian are crucial to the Olympians' success, and earn him a short bout of fame.
Luke Castellan: A 19-year-old demigod, as well as, the son of Hermes and May Castellan. Introduced as the friendly head counselor of the Hermes cabin, he is soon revealed to be a servant of Kronos. Luke is resentful of his father, who adhered to the gods' policy of non-interference despite May Castellan's mental illness. Luke runs away from home young and eventually arrives at Camp Half Blood. After the loss of Thalia, a failed quest, and continued silence from his father; his ongoing resentment turns into a strong hatred of not only Hermes, but all the gods. Though described by those who knew him before he joined with Kronos as a nice guy, he later becomes moody and violent. Luke is described as handsome with sandy hair, blue eyes, and a long scar on his cheek given to him by Ladon. He is first and foremost an excellent swordsman. He even receives a sword named "Backbiter" from his master Kronos at the end of The Lightning Thief. This sword, which is later reforged as Kronos's scythe, has the ability to harm both mortals and immortals. From his father he receives a pair of magic flying shoes, which he later curses and gives to Percy. He has also inherited an ability to open locks with his mind, along with a cunning nature, from his father. Just before giving himself over completely to host the spirit of Kronos, Luke bathes in the River Styx and obtains the invincibility of Achilles. Though Luke originally serves Kronos willingly, the horrors he witnesses during the Battle of Manhattan convince him to fight against his former master, eventually committing suicide to stop the Titan. By doing this, Luke proves himself to be the "hero" of the Great Prophecy. As he dies, Luke reiterates what Ethan Nakamura tells Percy earlier: that unclaimed children and unrecognized gods deserve more respect than they have been given.
