Harry has apparently talked about a Matron at his school in the book:
"Unlike other matrons, Pat wasn't hot. Pat was cold. Pat was small, mousy, frazzled and her hair fell greasily into her always tired eyes. Pat didn't seem to get much joy out of life."
Harry goes on to describe that she did enjoy catching boys being naughty and was "empathy challenged" when dealing with boys' minor cuts. He says Pat had many crosses to bear.
"The biggest being her knees and spine. The latter was crooked, the former chronically stiff. Walking was hard, stairs were torture. She'd descend backwards, glacially. Often we'd stand on the landing below her, doing antic dances, making faces. Do I need to say who did this with the most enthusiasm?"
He doesn't show any remorse but instead excuses it because he did it to make his friends laugh and he says that Pat also laughed if she caught him.
"I loved cracking up my mates but nothing quite did it for me like making the otherwise miserable Pat bust a gut."
Once again, not sure this really needed to be shared with the world.