Ienzo probably doesn't so much live with him at first as just show up a lot because whoever's in charge of making sure none of the local weres flip out and break everyone's cover thinks it'll be good for both of them to have friends with Shared Experiences. Ideally it'd be with their own kind or at least mainstream Garou society but Bertie's got his problems and Ienzo's a bit freaked out by the actual pack members thanks to their having some residual clan grudges against cats so you two go be weird in the corner together.

Hopefully they don't actually get on the subject of their shared experiences though because I can't see "How'd your first change go" "I killed a deer" "Oh, I mauled my Philosophy professor" going all that well.