Hank McCoy aka Beast

Actual Name: Hank McCoy
Code Name: Beast
Powers: ape like qualities
Hank used to go to Bayville High as a teenager too. When his powers manifested Xavier offered to help him. Instead of saying yes, Hank made a drink that helped him control his "inner beast"
Years later he returned to Bayville High. As the schools chemestry teacher. And quickly became everyone's favorite teacher. During one of his classes his beast started to emerge again. Trying again and again to contain it, but was useless. He returned to Xavier but, again, denied to stay there. Instead he made another drink. But this one didn't work. He couldn't control himself anymore.
His appearance changed too. Instead of looking human, he now lives up to his code name. He could go back to Bayville with an image inducer, but the news is now looking for him after the damage he caused. Currently, he is now working for Xavier.