Highly trained in the martial arts, Onyx first aligned herself with the League of Assassins before reforming and becoming a vigilante. She resides in Gotham City and is considered an ally of the Batman. In The New 52, she is a member of the Outsiders and the leader of the Fist Clan.

Onyx

Highly trained in the martial arts, Onyx first aligned herself with the League of Assassins before reforming and becoming a vigilante. She resides in Gotham City and is considered an ally of the Batman. In The New 52, she is a member of the Outsiders and the leader of the Fist Clan.

All data from the awesome folks at Marvel.