It was an odd case where she kind of knew him at the time and he needed a place to stay. Integra was convinced he was incapable of defending himself, though, ahaha. Then a month or so later her vampires started showing up and it was terrible.

Their relationship is based off of awkward and trolling. Everything smells like cigar smoke and there's vampires in the basement. It's a wonder why he still lives there, the poor guy.