(DeCandido's novelizations of Anderson's Films)
Dahlia Julia Mancini was a survivor of the global T-virus pandemic which ravaged the Earth in 2002. She disliked her name, preferring friends to call her "D.J.". After being rescued from a Kmart store, she used that as her new name.
At some point after the initial catastrophe, Kmart was discovered by Claire Redfield's convoy and has since traveled with them.