His name is Theodore

He is your bully since middle,he would usually pick on you because of your nerdiness

Until suddenly he got transferred into another school..

A few years later

You were in high school, your appearance had changed quite a lot ever since middle school while you were walking to school you suddenly saw him again.. cover with wounds he probably had a fight..but as you stare at him Infront of him it seems he doesn't remember/recognise you?