Emily Schmidt, neé Moulder is a Welsh witch, who attended Hogwarts school of witchcraft and wizardry. She was a gryffindor, and avid quidditch player, earning captaincy of the team in her fifth year, and continuing until her graduation.
Emily joined the Holyhead Harpies, her local team, upon graduation, and became their beater for many glorious years. During her time as beater, she met Derrick Schmidt, keeper of the Harriers. They'd met before a match between the Harpies and the Harriers, and an attraction had grown between them. Eventually, that attraction led to something stronger. Derrick, asked Emily, out. The pair went on a few dates during their time off, and slowly, that strong feeling was decoded as love.
After two years of dating, the pair broke it off. It had been Derrick's fault, really. After winning one of the most important matches he'd ever played, Derrick had gotten heavily drunk. It was somewhat odd, since he hadn't gotten that drunk since before he met Emily, as she didn't like it when he got drunk. One of the team's supposedly biggest fans noticed this, and approached the drunk quidditch player. She'd seduced him, and thinking it was Emily, Derrick took her to his place, where Emily had been waiting for him. Emily was basically destroyed to the point where she didn't let him explain and simply left. After that, she became much colder and released every single one of her emotions out in her matches.
She wasn't the only one suffering. Derrick could barely even focus during his matches and that almost cost him his career. His career did continue to live on thanks to his teammates. They knew he had the potential to lead them to the World Cup (which, as much as Derrick tried, he couldn't do it). Anyways, they banded up with the Holyhead Harpies (excluding Emily), and made a plan. They'd make him say the truth, and secretly record him. They'd pass the video on to the Harpies, and they'd make sure she saw it. Fortunately, the plan worked.
Derrick and Emily had a long conversation about what had truly happened, and Emily eventually forgave him, though he'd have to earn her trust again. Derrick didn't give it another thought and accepted. After a long year and a half of trying, Derrick finally got back together with Emily. After three more years, the pair got engaged. One more passed before they'd gotten married.
After all their children were born, Emily retired from quidditch to raise the kids, but she never stopped playing quidditch. Once the kids were old enough, she rejoined the Harpies, only as the manager, and that's been her job ever since.