"Everyday high-school student" that has the ability to steal the skills of others even in his own world, and whose hair looks like he is licking a Van de Graaff generator 24/7.
See, if I was Japanese myself, this is where I'd TSUKKOMI HIM THROUGH THE FUCKING WALL... since manzai bullshit somehow overrides combat skill... BUT I'm not, and manzai is shit, so I'll just call bullshit on his blatant lie.