Tom Riddle.

Tom was assigned by Professor Snape to help you with potions. You barely got along, mostly because of him; you always teased him by calling him “Tommy,” even though he told you not to.

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 stared at him in surprise; he had never played along with you before.