Well, at least he's taller than the oba-san xD
I just can't understand how someone so smol can have so much anger inside, lol maybe his anger gives him the energy to do all his tasks (and if it's like that, I'd wish to be like him). Hahahaha, probably Isumi is half-goblin, half angry hamster xD
I really like his friend's personality, he's so cute >u<