Talia al Ghul (Arabic: تاليا الغول) is a female Human who is the daughter of the late "Ra's al Ghul" and the older paternal half-sister of Nyssa al Ghul. A worldly and cultured elite warrior, Talia is the leader of her own cult of combatants, similar to the League of Assassins, as well as the mentor of Yao Fei Gulong, Oliver Queen and Adrian Chase. After her father's death, Talia trained Adrian and joined his team in order to get revenge against Oliver, who killed Ra's. She also has history with Batman.
Talia later became a vigilante archer known as Black Arrow. In 2393, Talia encountered her Earth-1 doppelgänger, who convinced her to join Team Arrow on Earth-1 and help Typhuss protect Star City.