Millie is of course going to make herself useful. She'd like to maul some bitches - because how do you become a big scary bear and not do that? - but if she's needed to guard something or escort kiddies or whatever, that's totally fine. The year's been rough, so now that she's got the opportunity she just may go apeshit.
Ozzie... I see him playing at the loud fearless leader type of the muggleborns, just running in charging and screaming. Oh, my reckless boy. <3
Feel free to injure either one, of course, to any degree you see fit.