Tori Sage Malfoy, the Slytherin Princess and Malfoy Heiress is bestfriends with a Muggle-Born witch.

Tori's family beliefs about blood superiority is stupidly ridiculous. Not only do they hate muggles and muggle-born witches and wizards, they believe purebloods like themselves deserve authority to do ridiculous things to those who aren't pure.

Hermione Jean Granger, the bestfriend of the Malfoy Heiress is a Muggle-Born witch who is excellently intelligent and the Veela's crush since their first year.