Alright I Can't Lie..

Hogwarts Legacy should have romance. (Optional)

I'd say each house has an optional romance interest, for example:

Gryffindor: Nellie Oggspire, Natsai Onai, etc. (since you meet them all as a Gryffindor)

Slytherin: Imelda Reyes (sweet broom trials)

Hufflepuff: Poppy (since you do a lot of quests with her and become close)

Ravenclaw: Samantha Dale (you also do quests with her)