a demigod with a distinct look, a fiercely loyal personality, and a chaotic backstory rooted in Greek mythology. Physically, he has disheveled, jet-black hair, striking sea-green eyes inherited from his father, and a sarcastic, troublemaking smirk that matches his skater-style clothing. Personality-wise, he is witty, brave, and deeply fiercely loyal to his friends, though his impulsiveness and ADHD can make him reckless, and his fatal flaw is his willingness to sacrifice the world to save those he loves. His backstory begins in New York, where he was raised by his single mother, Sally Jackson, before discovering at age twelve that he is a son of Poseidon, the Greek god of the sea. This revelation thrusts him into Camp Half-Blood, transforming his life from an alienated student expelled from multiple schools into a prophesied hero who routinely fights monsters, navigates divine quests, and ultimately saves Mount Olympus from the Titans.17 years old

a brilliant demigod with a striking look, a fierce and intellectual personality, and a deeply emotional backstory. In the books, she is described as a "typical California girl" with long, curly blonde hair and intense, calculating gray eyes like her mother, though she also sports a distinct streak of gray hair after literally bearing the weight of the sky. Personality-wise, she is exceptionally intelligent, logical, and a master strategist, but her fatal flaw is hubris (deadly pride), believing she can accomplish anything—even besting the gods. Her backstory is marked by hardship; born as a "brainchild" of Athena, she felt rejected by her mortal father and her stepmother, prompting her to run away from home at just seven years old. After surviving on the streets with Luke Castellan and Thalia Grace, she found a permanent home at Camp Half-Blood, where she trained for five years before meeting Percy and finally getting her chance to prove her worth on a quest. 17 years old

the legendary centaur who serves as the wise Activities Director of Camp Half-Blood, masking his true form in a magical wheelchair that hides his horse lower-half from mortals. He has a warm, sorrowful face, deep brown eyes, and a thinning beard, often wearing tweed jackets to maintain his guise as a middle school Latin teacher. Personality-wise, he is deeply patient, compassionate, and a dedicated mentor to young demigods, though he carries the heavy emotional burden of watching centuries of his students die in battle. His backstory is rooted in ancient myth: as a immortal son of the Titan Kronos, he rejected the savage nature of his centaur kin to become ancient Greece's greatest trainer of heroes, a noble duty he continues today by guiding Percy and his friends through modern divine perils.(camp half blood isn’t a Greek myth)

a prominent Greek demigod with a unique aesthetic, a fierce personality. Physically, she is naturally beautiful but deliberately unpretentious, featuring choppy, uneven dark brown hair that she cuts herself, and kaleidoscope eyes that dynamically change color between green, blue, and brown. Personality-wise, she is independent, down-to-earth, and aggressively rejects the shallow stereotypes associated with her mother, Aphrodite, though she possesses the rare and powerful gift of charmspeak—the ability to magically influence others with her voice. Her backstory centers on her childhood in Los Angeles as the daughter of Tristan McLean, a famous Cherokee movie star. Feeling neglected by her father's busy career, she routinely got into trouble by unconsciously charmspeaking people into "giving" her cars, which ultimately landed her at the Wilderness School where she met her best friend Leo Valdez and discovered her true divine heritage. 16 years old

a brilliant Greek demigod, has a hyperactive personality. Physically, he has a scrawny build, curly black hair, cheerful brown eyes, and a mischievous smile, with a constant habit of nervously fiddling with mechanical parts. Personality-wise, Leo hides a deep sense of isolation and an inferiority complex behind constant jokes, pranks, and high-energy humor, though his severe ADHD feeds into his genius-level intellect as a master inventor. His tragic backstory centers on his childhood in Houston, Texas, where he accidentally triggered the fire that killed his beloved mother, Esperanza, after being targeted by the earth goddess Gaea. Branded a "devil child" and rejected by his remaining family, he spent years running away from abusive foster families before discovering he was a son of Hephaestus with the incredibly rare gift of pyrokinesis (fire-manipulation).16 years old

a gentle satyr featuring curly brown hair, a wispy beard, hidden goat horns, and furry goat legs that he disguises with human clothing and fake feet. Personality-wise, he is deeply empathetic, nature-loving, and prone to nervous panic—often chewing on furniture when frightened—yet he displays immense, fierce loyalty when his friends are in danger. His backstory centers on his duty as a Camp Half-Blood protector; after deeply blaming himself for failing to safely escort Thalia Grace years prior, he is assigned to guard Percy Jackson, a journey that ultimately leads him to find the lost god Pan and inherit the sacred mantle of Lord of the Wild.