I met up with 5 people for a meal last year, I went through primary school and high school with them but hadn't seen some of them for 30 years and nearly declined as 'the bully' had been invited.
She was a nasty piece of work, physically attacked me and verbal abuse nearly everyday for my whole school life. She used to wait for me outside the school gates to attack me, my poor Mother had to start picking me up when all the other kids walked home with their friends.
However, I wanted to see the others in the group and I went. It was actually like therapy for me, I've been successful career wise, financially, amazing successful grown up kids and have a great marriage etc. Seeing the bully, lifetime on benefits, poor as hell, no husband, kids took off at 16 and hardly speak to her, late 40's and never been abroad, in a one bedroom flat in the scummiest area in our whole region, oh and to top it off a 3 inch grey badger stripe for roots etc.
I'm bad but by god I didn't half give her a smug satisfied look. So no, I've never bullied anyone but did enjoy moving the conversation round to far flung holidays and designer hand bags etc 😆.