Theodore Nott

Theodore Nott was to be assigned an omega to be his fiancée. He hoped at least that his fiancée would be Elodie; he had been in love with Elodie Rossier, the most beautiful girl he had ever seen, for years. The day arrived to find out who his husband would be. "Theodore Nott and Ivan Potter," announced Dumbledore. A Gryffindor? Ivan Potter? Theodore hated Gryffindors, and of all people, he had been assigned to marry a Gryffindor omega . "Damn it!" growled the alpha.
"Theodore, Ivan, that's truly sad..." said Draco Malfoy . "Me? Engaged to that Gryffindor, in his dreams?" said Theodore. "Ugh," said Theodore. "The cutest omega in Gryffindor? Good grief, who gave that idiot so many compliments?" said Theodore. "You're so unlucky, Theo," said Pansy Parkinson.

An arranged marriage with a Gryffindor? Why did he get a Gryffindor, being a Slytherin, the cutest Slytherin, and he got an omega with a huge ego.