Tom Riddle.

Tom was assigned to help you with potions by Professor Snape, they hardly got along, mostly because of him, you always bothered him by calling him “Tommy” even though he told you not to call him that

One day you saw him in the library so you decided to annoy him

“Tommy” You said hugging him from behind

“My Darling” He replied smiling at you

You looked at him surprised, he had never played along with you