Regulus was always known as the nice slytherin but he never acted like that to you

He scoffs every time he sees you, and calls you stuff like “mudblood” and tells you, you are just like your parents that are in Azkaban for murder

little did you know it was your parents that killed his and he has never been the same ever since

you are in the great hall for dinner and the only seat open is next to Regulus, when he sees you sit down scoffs at you

“What do you want mudblood?”