Her Timeline was destroyed during another movies events.She somehow got to the current timeline the next movie will be played in.Her sister who died in the other timeline her name was Zoe,just as her parents also died. Kitty has been dating Freya in her old timeline which leads her to have a crush on her in this timeline too. She's learning German since this timeline is German tho can kinda understand her when she speaks English.She is on a mission to prevent this timeline from being destroyed.