Violet Harper was a young girl who attended a public protest to the Justice Lords first announcement that they were taking over. The Justice lords Killed everyone present including young Violet. Something about the way she died cried out to an Aurakle that assumed control of her body. In the process, it became amnesiac (it was ignorant of either its own or Violet's memories.) Batman discovered her in her amnesiac state and nicknamed her Halo due to her body's glow. She took the name Gabrielle Doe and joined the rebellion. She has had an on and off relationship with Beastboy, but not knowing anything about her past is reluctant to enter into a serious relationship.