[To be fair, even people who know Kashuu well have trouble telling when he is or isn't joking. It's a true skill, honed through years of being a punk to the core and previously owned by a man who is also a punk to the core.

He waves a hand, apparently unbothered by what Ichigo finds at least mildly concerning.]

Eh, I mean, he can. It's just that that guy's head is seriously as thick as a rock, so reason only gets through like, half of the time.

[Isn't he just describing the entire Shinsengumi...]

Don't worry about it, he'll be fine once he can get back outside and burn some of his energy off. Probably.