When Black Canary traded places with Lady Shiva, Lady Shiva went to America and Black Canary travelled to the place where Lady Shiva currently resided and trained. There, Sin met Black Canary and the both of them instantly formed a bond. Black Canary then grew tired of the training given by Mother, the woman who was in charge of training Black Canary, and defeated Mother, and travelled back to America, where she brought Sin along with her. In America, Sin learned how to speak English and the Western world. Black Canary raising Sin was a handful, so Black Canary decided to leave the Birds of Prey, though changed once she joined the JLA.

Sin is very proficient in hand-to-hand combat considering her age and her small stature, taking down (about) five trained special agents to give an idea, though her full abilities in hand-to-hand combat is not known.