Thea Queen

Thea Queen is the younger sister of Oliver Queen, the vigilante known as the Green Arrow. Losing her parents at a young age, Thea turned to drugs as a teenager to cope. Oliver brought her into his lifestyle in order to give her structure as the Red Arrow, but her life fell apart when the Teen Titans disbanded and she learned her true father was Malcolm Merlyn. Brainwashed into joining the League of Shadows, Thea was found and rescued by Laurel and Sara Lance years later and has returned to Star City to repent for her misdeeds as Sin.