You have to sort all your characters into a new Hogwarts House instead of whichever one they were in originally. Which houses do they go into?
so I'm only doing this with my hp cast because I don't wanna cross contaminate but I have actually put a lot of thought into this since secondary houses are SUPER helpful for figuring out how a character acts.
Theo in Not (Our Parents)' Children and most of the Adjacent fics is a Slytherin main with a Hufflepuff secondary, but in Hyacinth his secondary is Ravenclaw. Hyacinth Theo would peel you like an orange and then pin you on his wall. I love him.
Fay is a rough one, because I like my girls well rounded and she could go anywhere - Gryffindor Main, and usually Slytherin as her secondary, but in No Matter How Tainted I think she's a Ravenclaw secondary? She's very loyal to her friends, in all iterations, but specifically in No Matter How Tainted and in Forest Folk, she's curious. A schemer, yes, but the schemes come as a means to sate her curiosity, so in those aus I think she'd be Ravenclaw.
Blaise's secondary I usually have foil Theo's - so in NOPC and Adjacent he's Ravenclaw secondary and in Hyacinth he's Hufflepuff secondary.
For my wbwl au twins - Delphi is sorted Puff, but her secondary would be Gryffindor. Connor, Sorrel, Tristan, and William are all Gryffindor Mains, but Connor's secondary would be Hufflepuff. Sorrel's secondary is Slytherin and he canonically was upset that he got sorted Gryffindor instead, because he's a little compulsive liar and he wanted to be in the house of sneakiness and lies, where he thought he might fit in a little better. Tristan... I don't know. Maybe he'd be a Ravenclaw second? Tristan is from the au where Harry died and haunts his twin as a ghost only Tristan can see, so Tristan has a vested interest in learning things, specifically necromancy, but I don't know if that's enough to make him a Ravenclaw? He also has major trust issues and most of the school thinks he hallucinates. He could go to Hufflepuff if the Hat is like 'oh my goodness if you don't get friends stat I think you'll destroy yourself or the world'. Tristan is not allowed in Slytherin though. He would create too much chaos. William... Ravenclaw. He's canonically an Encyclopedia Brown fan and he spends his free time reading cold cases, there's no where else to put him. Well, no, an argument could be made for Huffllepuff because he learns about Harry and is instantly on his side and Harry's ardent defenders (please note Harry is actively committing war crimes and terrorism during this).
Harry can go in any house, if I want him to, he's Gryffindor canonically and his canonical secondary house is Slytherin, I've put him in Slytherin in a lot of aus, but he's Ravenclaw in Anethrystic, and I know I have a hufflepuff Harry au somewhere... I think the miraculous crossover he's a puff, and I think he's a puff in the fic where Luna is his and Ron's age - specifically Luna was aged up, Harry wasn't aged down.
I also want to note that I think Lavender and Parvati are Ravenclaw Secondaries, because they're both really smart and totally get into topics that they care about and want to get into.













