So unnecessary. They seem to trust him with their lives, so why is he uselessly doing the magic equivalent of cutting himself instead of, y'know, just being a normal person? I mean, at least when Japan does dumb edgy shit like this it's done by actual highschoolers; this guy is meant to be a highly experienced supreme combatant of sorts, all mature and shit, and they just go and make that impossible to believe. What a fucking drama queen.