Due to a Time Slip on July 30, 1997, Kylie was stuck in the future, fulfilling her future self's prediction. After her death, a group of rebels kept her cause alive and preserved some of her belongings, including her journal. She prophesied she would one day return and help end the tyranny of Tempus. In an alternate future, Kylie became a highly revered figure. She is the only character to have a completely different uniform, other than Eduardo, than the other Ghostbusters, which is customized to fit her small build, and basically consists of a form fitting body suit and torso armor. It is powered by a small proton pack attached to her belt. Her Proton Pistol weapon is a pistol version of the full size proton pack and blaster. Rather than having a full sized proton pack, Kylie carries a smaller lighter pack which she attaches to her belt and carries the new ghost trap on her back. She is also the team's primary member who holds and deploys the ghost trap.

In the new Ghostbusters team, Kylie usually takes on the role as the paranormal expert of the team whenever Egon was not present. She became a 'Brainiac' (genius) with a scientific interest in the paranormal. Rose died sometime in 1996 and Kylie now lives with her cat, Pagan.

Prior to Kylie becoming an Extreme Ghostbuster, Kylie's parents divorced and she became close with her Great Grandmother Rose. She blocked the memory and kept it repressed for a decade.

No one believed Kylie's account of what happened either. The Grundel then went after Jack and turned him. Kylie was visited by the Grundel but she was strong of mind and resisted his calls. Guided by original ghost buster Egon Spengler, the mantle this time is taken up by a group of teenagers: steady Roland cocky, wheelchair-bound Garrett would-be hippy Eduardo gloomy, black-clad Kylie and ex-baddie ghost Slimer, now helping his friends rid the world of the nastier and meaner ghosts.In 1987, when Kylie was a child, her only friend was a seven-year-old boy named Jack. After a lull, ghost activity is on the up again. Proving that there’s still life in the old story, Ghostbusters gets another reincarnation, with state-of-the-art animation that’s both riotous and genuinely spooky.

Extreme ghostbusters kylie