Nobody needs to leave. It's fine. The more the merrier, especially if they can offer some help in keeping the city safe or we can help them in some way. That is the purpose of all of this, after all.
Yeah, Kathy is definitely from the wrong time. A couple of hundred years, give or take a half a century or so. In fact, she's Angel's sister. She's a nice girl, too. Sweet. It's no surprise Annie likes her. Annie's a pretty good judge of character, from what I can tell.