Percy Jackson is the Greek demigod son of Poseidon and Sally Jackson. He is the Head Counselor of Poseidon's Cabin at Camp Half-Blood and a former Praetor of the Twelfth Legion Fulminata at Camp Jupiter, formerly belonging to the legion's Fifth Cohort.

Annabeth is the demigod daughter of Frederick Chase and Athena. She is the head councilor of Athena cabin.

Bianca is the daughter of Hades and sister of Nico, after the quest to rescue Annabeth she realized how much she missed Nico and left the hunters of Artemis

Jason was the Praetor of camp Jupiter before Juno (Hera) took his memories. He is the son of Baryll Grace and Jupiter, the roman version of Zeus. He is dating Piper

Piper is the daughter of Aphrodite. Girlfriend of Jason Grace. She is proficient in charm speak

Leo is the son of Hephaestus. He controls fire, and has a magic toolbelt where he can grab whatever he wants just by thinking of it, and that means ANYTHING

Frank is the son of Mars. He can shapeshift into animals and is good with a bow and arrow

Hazel is the daughter of Pluto, she died centuries ago and was brought back by Nico while visiting his dad Hades. She has a masterful control over the mist after being trained by Hecate

Nico is the son of Hades, he was trapped in the Lotus Hotel for sixty years with his sister Bianca. He is dating Will Solace.

Will is the son of Apollo, he is dating Nico, and he is good with medicine.