But the thing is, there IS sort of a "bully who's mean to you on your first day becomes the hero's friend and a secondary protagonist" type of character in the HP books. Or at least his role seems to fit that development or going toward that direction, and his name is Snape. Or is it another "no he's old not peer so doesn't count" thing? And I don't see how "gender" of author has to do with anything either (which you seems to suggest).

I saw DB over a year ago so I don't quite remember it. I was kind of disappointed at it. I remembered the villain reminds me of Tom Riddle.