It hasn't started very well, because she's afraid of all the others and will make attacks towards them if they get close. So I've put her in the bathroom for the time being.

I do let them fight, but I try to keep it to 1-on-1 as much as possible. Seems she handles that rather well, except when it comes to Alison who's obviously got more presence than the others and thus can chase Röskva away. The others actually back off sometimes, but if they don't I break it up after a little while so they won't get to badly hurt.