Fifty Sue was a powerful metahuman whose powers activated when she was a child.
The first superhuman whom Project Cadmus attempted to grow, the project of Fifty Sue was not considered to be a success. 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. Thus, she spent most of her time terrorizing Cole "Grifter" Cash and was quite upset when a "stealth" OMAC attacked him. Journeying to the subbasement of Cadmus Island, Sue found Earth 2 "normals" housed there. Splitting her conscience, at the same time, Sue was trying to help Deathstroke take down Big Barda and Emiko but was eventually defeated.
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. Despite her great powers, Fifty Sue's erratic behavior was what made her unpredictable, with her constantly teetering the line of good and bad.