Fifty Sue was a powerful metahuman whose powers activated when she was a child.
Taken as a small infant by King Faraday, her potential was recognized. The FBI agent decided not to kill her, but rather grant her asylum at Cadmus Island. There she was allowed to do whatever she saw fit. Eventually joined by Deathstroke the Terminator, she began to view the mercenary as a mentor and partner. When Faraday revealed they would be joined by Grifter, she was initially upset.
A very powerful telekinetic, Fifty possessed the ability to levitate objects, peel off the skin of people and teleport them places. Her power was not limited to telekinesis as she also possessed the ability to split her conscience in fragments, allowing her to be in more than one place at one time.