Oh, oh, oh, okay. Chapter 2 not the same as episode 2. Hehe, it's been awhile since I watched. (if anyone is reading this who hasn't seen Legion season 1 and doesn't like spoilers stop reading,) In Age of Apocalypse that Kitty is from the Shadow King works for Apocalypse and there aren't many telepaths left because they've been harvested (like brains in jars) for him. (It's the AU of everything being the worst all the time.) So, she is aware of that guy and firmly not a fan! Jean was on the team though (at least initially) so Kitty has worked with her before.

Also, her power is phasing through walls and such. I hope that isn't traumatic for him considering what happened! (She does it a lot.)