Seven black diamonds

Lilywhite Abernathy is the daughter of a mob boss and part fae in a world where war exists between humans and fae. When she goes to the prestigious St. Columba's school, she encounters a sleeper cell of fae called the Black Diamonds whose mission is to destroy the human world from within it. Disguised as rock stars and celebrity children, Zephyr, Creed, Will, Roan, Violet, and Alkamy choose Lily to join them, but Lily thinks the world of organized crime just might be safer.