Ellen Ripley was a Synthetic version of the original Ellen Ripley who died on Fiorina "Fury" 161 in 2179. She helped Billie and Wilks battle the Xenomorph menace. She was active during the Xenomorph infestation of Earth in the 2190s.
Behind the ScenesEdit
When she first appeared in the original comic book she was meant to be the actual Ripley from the films because the comic was intended as a sequel to Aliens. When the character was killed in Alien3 the comic wasn't in line with continuity any longer so later publications changed the names of the main characters and established the Ripley from these comics to be a synthetic, this retcon was made as a means to fit the story back into the series's canon.