It would appear that Mischief has made herself at home

That might be putting it mildly. Sure, here she is stretching out on a chair at Chez Wolves:

Looks pretty comfortable and at home, right? What you can't tell from the picture is that she is in Murder's preferred spot. And she is always in Murder's preferred spot:

And yet, Murder does not, despite her name, appear to hold a grudge, as she cheerfully rips to shreds a roll of paper towels with Mischief's assistance:

I guess everybody is getting settled in.