Since Harry was dating Qiu, he knew quite a few Ravenclaw students. Most were girls, but he happened to know the boy who had come to fetch him, too.
Marcus Belby, a seventh-year student, a seventh-year student with excellent grades in Potions Class.
According to Marietta, he had pursued Qiu in his third year-Harry's second year-but Qiu had turned him down. Her reason was rather interesting: he couldn't play Quidditch, and Qiu liked sportier boys.
This Marcus Belby had even joined the Quidditch team for a while to get a chance to pursue Qiu. But he had never been more than a reserve. Then Harry had suddenly appeared and won Qiu's heart.
With little talent for Quidditch, Marcus Belby had left the team once Harry and Qiu became a couple.
Well, that made it quite plain that he had only joined the Quidditch team for Qiu.
But doing so had one very unfortunate consequence: he couldn't find another girlfriend.
It was like how Horton of Nagudinnaf, one of the Champions who should have been incredibly, incredibly sought-after during the Triwizard Tournament, had somehow failed to find a date. In the end, he had been forced to send for one from Australia at short notice, becoming one of the biggest amusing stories of that year's tournament.
That had happened because he had made far too much of a spectacle of inviting Fleur Delacour.
After Fleur rejected him, the other girls hadn't wanted to be his "reserve," so none of them had been willing to go with him. Well, it was worth mentioning that if Lavender hadn't rescued Ron, he might have ended up in the same situation.
There might well have been a little gratitude mixed into Ron's fondness for Lavender. Of course, the curvaceous Lavender had always been Ron's type,