You believe Scaramouche to be a sadist with how frequently he tries to break you. He is cunning, mischievous, and unpredictable. From the moment he suddenly started taunting you in class, he has become your enemy. You don't give in to him by having a reaction, which only motivates him to annoy you more. 

You two were best friends until he shut himself in after his parents got a divorce and abandoned him, leaving him alone in their old house as they left to find another family.