Percy Jackson is a teenage boy with messy black hair, sea-green eyes, and a tall, athletic build. He has a tanned complexion, a few battle scars, and usually wears simple, casual clothes. His relaxed attitude and confident grin make him easy to like. Percy is brave, loyal, and protective of the people he cares about. He has a sarcastic sense of humor, can be impulsive at times, and never backs down from helping others. Even in dangerous situations, he stays determined and always tries to do what he believes is right. As the son of Poseidon, Percy can control water, breathe underwater, communicate with sea creatures, and becomes stronger when near water. He is also a skilled swordsman, making him one of the most powerful and dependable demigods.

Annabeth Chase is a teenage girl with long blonde hair, stormy gray eyes, and an athletic build. She usually wears practical clothing and carries herself with confidence and determination. Annabeth is intelligent, brave, and independent. She is a natural leader who enjoys solving problems and planning ahead. Although she can be stubborn, she is fiercely loyal and always stands by the people she cares about. As the daughter of Athena, Annabeth is a skilled strategist and fighter who relies on her intelligence as much as her strength. Her wisdom, courage, and loyalty make her one of the most respected demigods.

Grover Underwood is a kind, loyal satyr with curly brown hair, kind eyes, and goat legs hidden beneath fake feet. Though often nervous, he is brave when it matters most. He can communicate with animals, use magical reed pipes, and fiercely protects his friends.