I don't think attacking first would ever be her first choice, but like in fighting that healers body guards, she has shown to make the first move if the stakes are high enough. This is all moot at this point, as this seems to have been cold feet, like sunphoenix said. I do think she would have at least matched that one guys rank though.
I kinda have a feeling Suspiria has figured out what Qtalda did with Mary and may go meet up with her, either to recruit her to fight the thin man or get revenge for Kin. I'd be most surprised if she shows up in Bern's storyline first.
Actually, the "bodyguards" both drew steel and swung first. Sure they had the right to "escort" or forcefully remove Bern from the shop, but they did NOT have the right to employ lethal force.
As for the "fanservice," I have to agree with Bern. Those costumes are WILDLY impractical for any sort of real fighting. I'm not talking armor class, I'm talking, "oh look, the damn thing fell off!" If I'm visiting an arena to see a fight, especially if I'm making a wager on the outcome, I DO NOT want the participant's clothing becoming an issue to hinder the fight.
I don't mind "stripperific" outfits in general, and if they were practical in the arena, that would be fine. But IMPRACTICAL stripperific outfits are a no-no. Any spectator who thinks differently needs his head examined. At least the warden is equal-opportunity regarding gender, so can't fault him on that.