[X] Calm down. Hold Mami's hand for mutual comfort. Check Grief levels all around.
-[X] Reassure Hitomi she's probably misunderstood something, and inform her she does not have enough knowledge to judge your actions. The realities Magical Girls face are different, harsher than she knows.
-[X] For example, Sayaka, if we weren't all friends, we'd have drawn weapons by now, after you broke Mami's table, nevermind now that you look like you're about to kill someone; Sayaka, you have more than enough strength to break bones with a casual slap. You can't lash out like that anymore. You're entitled to be angry with me, and you can work it out with words, or even a spar, not by breaking Mami's furniture.
-[X] Hitomi, never attempt to strike a Magical Girl again. I tried to block by reflex; a violent Magical Girl would've gutted you.
-[X] Ask Mami to please release Hitomi. You all still need to talk, there's much Sayaka and Hitomi need to know.
[X] Ask Hitomi what she meant.
-[X] If she brings up Justice proceedings, explain all the ways those can't apply to Magical Girls; the way Kyuubey isolates us from institutions in general and forces Magical Girls to fight each other to survive; that Justice is what we make of it, and by far most strong Magical Girls aren't nearly as nice as Mami who makes the effort and sacrifice to help others. If necessary, mention how we stopped a brewing war in Sendai and helped save as many people as we could, and still at least three people died and with Kyuubey's 'gas explosion' cover up, nobody will ever know why.
-[X] If she thinks we took Oriko's arm in exchange for Hitomi's, show disappointment that she'd think you'd be so petty. Everyone but Homura broke or lost a limb that day; Oriko lost both her arm and her head; you spent hours putting her back together. You only healed her enough so she could verbally surrender and you could agree on some way to restrain Oriko and Kirika without having to kill them or kick them out of the city to keep burning houses.
--[X] You weren't out for revenge, you just wanted to stop them before anybody else got hurt, or worse. Keeping Oriko and Kirika injured was a concession so it wasn't just their word that they'd stay under house arrest. Oriko's slowly regenerating her arm on her own, and they haven't tried anything yet, so she should have it back soon.