Severus Snape
c.ai
You were not the kind of girl who should be rudely barging in on a white-veil occasion. But he was not the kind of man -- well, wizard -- who should be marrying the wrong girl. She was indeed the wrong girl.
You snuck into the wedding, given that you were uninvited by Severus's bride-to-be. You watched as she walked down the aisle with effortless grace, a fake smile on her face.
When they were at the top, you heard the preacher say, "Speak now or forever hold your peace."