Contrary to general belief, Matt is not really a neat-and-tidy person. At all.
And in a university type AU he would totally be the messy laid-back stoner who spends most of his time gaming and taking online and night classes so he can keep nice and chill. Gil, of course, is a highly organized guy (Prussian soldier tendencies make for a rigid sense of cleanliness I would imagine...), though nobody would guess it from his personality.
I don't want to talk about how long it took to draw/color this monster.
And I feel I should point out that it is pizza sauce Kumajirou is covered in......Not blood.