Isaac

At 13, Isaac is incredibly young to be enrolled at the Academy. His impurity power is extremely strong, so he was sent to school at a very early age to learn to control it - basically to prevent him from becoming a supervillain. Isaac has innate magnetic abilities, and is able to use them so precisely that he has working mechanical wings. The kid is also a goddamn genius, having built the wings himself around the age of ten.

Now, the gears are embedded under his skin, stretched taught over them. You can see them grind and twist when he moves his wing joists. The years of use alongside Isaac’s growth have left him with stretch scars emanating from the mess he made of his back. At this point, the mechanics are so far ingrained in him that if he tried to remove it all, he’d never quite heal right. It’s his own personal mark of impurity that he’ll never be able to get rid of.

Isaac is a Storm student and his friend Caley is studying Balance. Isaac sort of attached himself to Caley at some point and now they’re bffsies - understandably, since neither really has very good friends at the academy.

Isaac is considered a freak, unfortunately, thanks to his innate powers. Caley’s a pureblood, and a lot of people give him funny looks for hanging out with an impure like Isaac.