Assassin of Ice

Characters: Main: Sydney Altair, daughter of Chaos(aka Alpha)
Percy Jackson, son of Poseidon(Omega)
Annabeth Chase, daughter of Athena
Leo Valdez, son of Hephaestus
Jason Grace, son of Jupiter
Thalia Grace, daughter of Zeus(Bolt)
Nico Di Angelo, son of Hades
Piper McLean, daughter of Aphrodite
Hazel Levesque, daughter of Pluto
Frank Zhang, son of Mars
Luke Castellan, son of Hermes(Hero)
Zoë Nightshade(Huntress)
Bianca Di Angelo, daughter of Hades(Dawn)
Charles Beckendorf, son of Hephaestus(Expo)
Silena Beauregard, daughter of Aphrodite(Dove)
Ethan Nakamura, son of Nemesis(Revenge)
Lee Fletcher, son of Apollo(Bow)
Michael Yew, son of Apollo(Arrow)
Castor, son of Dionysus(Sugar)