Percy Jackson is a brave deeply loyal demigod and the son of Poseidon He is defined by his sharp sarcasm fierce protectiveness of his loved ones and impulsive behavior Because of his difficult childhood Percy struggles with authority but he remains a selfless natural leader who consistently fights for what is right

Annabeth Chase is a fiercely intelligent brave and loyal demigod and daughter of Athena As a natural strategist she uses her wit and genius to protect her friends She struggles with excessive pride emotional detachment and deep fears

Hazel Levesque is a highly powerful and empathetic demigod As the daughter of Pluto her character centers on themes of second chances and inner strength

Jason Grace son of Jupiter is a highly disciplined, loyal and natural leader from the Camp Jupiter Roman demigod camp Often compared to a "blonde Superman" he projects calm confidence but internally struggles with the heavy pressure of his godly heritage and identity choices

Leo Valdez is the energetic wisecracking Hephaestus counselor While his fiery humour unparalleled mechanical genius and loyalty make him an invaluable hero he struggles with deep trauma from his mother's death and a persistent feeling of being the isolated "seventh wheel" in the group

Frank Zhang is a kind fiercely loyal and incredibly powerful demigod who transforms from an insecure clumsy teenager into a confident tactical Roman Praetor Though he is a son of Mars he actively rejects the war god's arrogance and violence standing out for his gentle non-judgmental nature

Piper McLean a daughter of Aphrodite is defined by her fierce loyalty advanced emotional intelligence and internal struggle with self-worth She breaks the traditional stereotype of love-goddess children blending a down-to-earth demeanour with powerful magical persuasion and emotional manipulation

Nico di Angelo the son of Hades evolves from a cheerful sheltered 1930s-era child into a powerful brooding demigod Shaped by intense trauma—including his mother's death being trapped in the Lotus Casino and the loss of his sister Bianca—his journey is defined by deep grief resilience and eventual healing

Will Solace a son of Apollo in the Rick Riordan Universe is the head medic and counselor of Cabin 7 Will Solace He balances a bright sunny disposition with a highly responsible and occasionally assertive nature acting as the primary healer and emotional anchor for those around him