Ah, the cute but deadly type. Kinda thought that might be the case...

[ Haru does have this sort of polite-but-deadpan way of speaking, and for her choice of weapon to be an axe of all things... ]

Yeah? I better get to see her in action soon. [ ... ] Ehhhh, but not while cutting someone's arm off. No one else is allowed in our club.

[ It's highly exclusive...and he likes to think the group will be smarter next time. More coordinated. (Narrator voice: this would quickly prove to be untrue.) ]