Why do you think shinsou has such extreme dark circles?? Do you have a headcannon for that lol
YES! I have a good little headcanon for that!
I had this idea in my head that maybe Shinsou’s dad ( If it’s not Aizawa.. ) has some kind of ‘’No sleep’’ quirk. A quirk that allows him to stay awake.. Basicaly forever. ( How useful ) And since children often inherit of their parents quirks, Hitoshi didn’t get his father’s quirk but inherited of a capacity to stay awake longer? Or that he doesn’t need as much sleep as a normal person. So the dark circles come from there.