Bullies don't have to be buff necessarily.
As a victim, I was a buff kid. But that didn't stop skinny, self-entitled, reluctant brats like Ryan from making my life a psychological hell at school. Something about his skinny limber body and his narrow/piercing judgemental expression towards me and my family was humiliating for me.
I guess as a boy he was a cross between looking like Eliot from 'E.T the Extra Terrestrial', Bastian from the 1st Neverending Story, Greg Heffley from 'Diary of a Wimpy Kid' and Mike Wheeler from 'Stranger Things'.
Now days he looks like that famous skinny British male porn actor Danny D/Dong lol