Little Serial Killer

So Rick is a pureblooded wizard from a long line of Gryffindors. Lori was a muggleborn who was also in Gryffindor, they dated from fifth year. Carl is born first, and then Judith. Rick had a rivalry with muggleborn Negan as a student, competing constantly with the Slytherin. Rick ends up becoming an auror, befriending Shane, a Slytherin he’d barely known in school. Shane, however, had been obsessed with Lori. He ends up having an affair with her. He treats Carl horribly when the boy finds out. Lori dies protecting Carl from Voldemort (who used to be Philip Blake). Carl loses his eye when the killing curse is cast on him, but survives. Shane becomes worse to him, blaming him for Lori’s death.

Hershel is the previous owner of a tavern in Hogsmeade. He sold the business to Abraham, who runs it with his fiance Sasha. Abraham is an ex-auror who had to resign due to a scandal between himself, another auror, Rosita, and Sasha.

Carol is the headmistress of Hogwarts when Carl attends. 

Rick retires from being an auror due to his guilt over Lori’s death, becoming a Defense Against the Dark Arts teacher for younger students. He’s the head of Gryffindor.

Negan is the DADA teacher for higher level students and the older students. He’s the head of Slytherin. He’s a controversial teacher because he accidentally killed Glenn Rhee, the head of Ravenclaw, in a bar fight. Maggie took over her deceased husband’s position as both head of house and teacher of Transfigurations. Negan is also v e r y popular among seventh year girls (and boys) for obvious reasons.

Ezekiel is the head of Hufflepuff, the deputy headmaster, and teaches Charms for younger kids. Jesus teaches advanced Charms and the older kids.

Carl ends up in Slytherin, but befriends with a Hufflepuff, Beth, and a Gryffindor, Enid. Rick and Negan are incredibly bitter and hateful to each other, but do their best to not do so in front of students. Carl develops a huge-ass crush on Negan.