I'm late to the party and you've already done it but...DO IT. Piros was basically made to be messed with. Well...until he gets possessed by a demon or something. XD
Well I imagine a magic school would probably force all students to take a standard core curriculum. Other then that Taro would most likely be in a music class, a sport or gym class of some sort, and a class specific to elemental control.
A magic eater or leech. It could be a supernatural creature we all must band together to find and be rid of. If not it could drain our powers or worse.