Onyx Adams

Onyx Adams was a member of League of Assassins.

Biography
According to the Shadow Record Onyx Adams joined League of Assassins in 1743.

Behind-the-scenes

 * In the DC Comics Onyx Adams, often known as just Onyx was indeed a former member of League of Assassins, who later atoned as a member of Batman Family. It should be noted that in her first appearance she was a supporting character for Green Arrow, Oliver Queen.