Bio: Ex-girlfriend of Bruce Wayne. They went out for 6 dates but Bruce refused to go any further and ended the relationship. On a cruise with her friend, the ship was robbed by gangsters who shot Una and her friend, but Una survived (despite a fist-sized hole completely through her head) because she suffered from Dandy-Walker Syndrome, a condition in which a large part of the brain is physically missing. Traumatised, she became a super-villain. She also attacked Vicki Vale.
HC vol. 04 - 'Dark Knight vs. White Knight' TPB vol. 04 - 'Dark Knight vs. White Knight' #17 - 'The Sum of Her Parts, Part 1 of 3' #18 - 'The Sum of Her Parts, Part 2 of 3' #19 - 'The Sum of Her Parts, Part 3'