here's my takes for the music club:
luke and milly's are obvious but i'll elaborate on the rest.
jake is ambitious, and he has a thirst to prove himself (like harry did!). he also has an edge of viciousness slytherins are so notorious for, as he saw nothing wrong with his bullying of the music clubānot to mention the audio, because just doubting your friends' loyalty is different from saying all those things in the heat of the moment. if jake had been a less of a vicious person, he wouldn't have said the "hailey can't even sing without me because of her stupid stage fright" bit because, again, believing he's still doing this for daisy, that sean had betrayed him, is different from bringing hailey's worst fear into it.
i believe that the sorting hat would've told him that he could be a gryffindor, because he could, because he has the bravery, the need to be a savior, but his need to be great, to be loved, far outweighs it. thus why he would refuse the hat's offer and join drew in slytherin instead, grasping for a sense of safety and familiarity.
(also, he's a classic pushover, so i think he would've been insecure and doubting the hat's claim that he could be a gryffindor in later years.)
anyways. i often see zander and hailey as ravenclaws which does make sense but i personally believe them to be gryffindors. gryffindors are stubborn, hot-headed (milly), and have rigid morals. that definitely describes zander (and i think the chivalry trait fits him too).
HAILEY though... at first i was skeptical about it but honestly, it makes senseābecause she is brave. let's not forget she was bullied in middle school too, but she didn't let that break her (the parallels with jake go crazy). that takes a whole lot of bravery. plus, she's also a leader, which gryffindors often are good at being (like harry and hermione!). she keeps everyone motivated and is the backbone of the group.
sean... before i get to that i actually have a small drabble? of jake's thoughts in a universe where the events of tmf take place in a hogwarts au.
(zander are hailey are written as ravenclaws here)
Jakeās mother is the disinherited daughter of a pureblood family. His father is a muggle he's never known. His brother is a Gryffindor, bold and loud and everything Jake never was. And Jakeā
He is a Slytherin. Above all, he is ambitious. There's an edge of viciousness to him, the part that enjoyed taunting people for years.
But deep down, heās always wanted to be loved.
Loved, revered, admired, whatever you may call it. And he was. He thought he wanted it, from Drew with his sharpness, from Liam with his observant eyes, from Henry with his unique ability to make people laugh. From Zoey and Lia and Daisy, butā
What he wants, is Hailey's understanding smile and soft voice. What he wants is Zander's sharp wit and the rigidness of a couldāve-been-Gryffindor. What he wants is Milly's fierceness and Luke's kindness and Seanā
Sean, who stayed up with him late at night and told him how the hat told him he'd be well suited to be a Slytherin, who smiles soft with an edge of sharpness, who doesn't ask for touch or help or anything at all but Jake knows he needs anyway, who Jake thinks is the one person he has loved the most honestly in his whole life.
Who, at his core, is a survivalist.
(And a couldāve-been-Slytherin.)
And Jake loves them. But does he fit here, in the forgotten music club room, with the people who love him despite all he's done to hurt them?
(Does he deserve it, at all?)
...did i mention i talk a lot?
the sean part was mostly inspired by snape and slytherin harry aus. i don't think sean has the capability to do the things snape did, or the desperate need to be great the way harry did, but he does want to be loved. it's possible he learnt to be sly and cunning to avoid his parents (since i headcanon his homelife to be exactly like snape's in a hogwarts au).
but sean is still loyal and sweet to the coreāthese are the two paths a man could take. snape chose slytherin to be great, sean chose hufflepuff to be loved (just the way harry chose gryffindor to be with ron).
other castings i have: all the jomies and the jomie girls as slytherins (because duh, although lia's case is interesting but this is already pretty long lol), hufflepuff daisy (it just makes sense for the golden girl to be hufflepuff), ravenclaw stacy (mostly for the aesthetic but she does remind me of cho), hufflepuff sadie (it would be hilarious to have the emo/goth be a hufflepuff), hufflepuff elliot (although you could go the neville route with him and making him gryffindor), gryffindor faye and dominic (weasley twins reincarnated!??!?!?), and slytherin bradley (boy lowkey reminds me of snape in his hogwarts years but more in a socially awkward sense).