Selene was a business partner of Abslom Daak and Vol Mercurius. Together, they defrauded pan-galactic shippers of four billion. However, Daak was betrayed when Vol Mercurius ran away, taking the money and Selene with him. The memory of Selene "[ate] away at [Daak's] soul", turning him into a killer. By the end, Daak noted that he hated everyone but her. (COMIC: Abslom Daak... Dalek Killer, Star Tigers)
Behind the scenes
Selene would have been killed off in the proposed ten-issue miniseries After Daak. However, the series was never commissioned.