Perseus "Percy" Jackson is the Greek demigod son of Poseidon and Sally Jackson. Percy has tan skin, disheveled, jet-black hair swept to one side as "if he just took a walk to the beach" and sea-green eyes, which he inherited from his father and grandmother. He also has a sarcastic, troublemaker smile. He's dating Annabeth Chase.

Annabeth Chase is the Greek demigod daughter of Athena and Professor Frederick Chase, the half-sister of Bobby and Matthew Chase, and the paternal cousin of Norse demigod Magnus Chase. Annabeth is described to have tanned skin and a slender, athletic body. She has long honey-blond hair set in perfect princess curls, like Cinderella.

Grover is described as a tall satyr with curly brown hair, brown eyes, horns, a wispy beard, acne, and hairy brown goat legs. Grover is usually cheerful and upbeat, yet he chews on things when he's nervous, adding to his role of glutton. Some habits of his include chewing on furniture, clothing, biting his nails, and tugging at his goatee or his leg fur. He cries when he is upset, which makes him an easy target for bullies.

Leo was born in Houston, Texas, to the mechanic Esperanza Valdez, and the blacksmith god Hephaestus. Unlike most of his half-siblings, Leo has the rare ability to control fire. He is the first child born of Hephaestus to be able to control fire in centuries. Leo is described by Jason to look like a "Latino Santa's elf," with curly black hair, dark brown eyes, a cheerful, elf-like face, normally with a mischievous and impish smile, and a diminutive stature with a slim and relatively scrawny build. Leo is mischievous, flirty, upbeat, resourceful, eccentric, and impulsive, and loves to tell jokes constantly, even if they aren't particularly funny.

Thalia Grace is the Greek demigod daughter of Zeus and the mortal Beryl Grace, and the older sister of Roman demigod Jason Grace. After she was mortally wounded by attacking monsters, she was transformed into a pine tree on Half-Blood Hill, which still stands as the official border for Camp Half-Blood to this day. Thalia is a teenage girl with shoulder-length, spiky black hair, electric blue eyes, and freckles across her nose.

William "Will" Andrew Solace is a sixteen-year-old Greek demigod, the son of Apollo and Naomi Solace. Will is noted as having a surfer-body, shaggy curly blond hair, blue eyes, and having an athletic build. His appearance reminds Nico of Jason Grace He typically dresses casually in a T-shirt and shorts.

He's a son of Hades and has a more gothic style (this is all I can put. For more info, go to fandom.com for Nico Di Angelo)