Harry Potter but Ron's in Gryffindor, Hermione's in Ravenclaw and Harry's in Hufflepuff
Hufflepuff Harry having gone through a lot of domestic abuse at home and swearing to never hurt someone the way he's been hurt
But still being a badass bc who says Hufflepuffs can't single handedly take down Voldemort/Quirrel at age 11
Harry challenging Snape and every stereotype about Hufflepuffs being meek and quiet
Gryffindor Ron's sass and smarts shining through even more, and sneaking his friends into the Gryffindor common room so many times everyone just lets him do it at this point
His tactical strength shining through and McGonagall seeing his potential and pushing him further
(McGonagall still being a huuuge maternal role for the three obviously, but maybe getting more interactions with the Ravenclaw and Hufflepuff heads??)
Ravenclaw Hermione becoming friends with Luna and learning even more about Hogwarts' history and Rowena's past earlier on, Ron excitedly talking to her about the secret passages and what do you mean you knew about that one already Fred and George are the first to discover it in the last 100 years
Hermione sometimes plopping down at the Gryffindor table in a rage because the riddle today didn't even make sense a raven is nothing like a writing desk
The three of them banding together despite being in different houses and challenging every stereotype ever
The three of them uniting the houses and befriending Draco
Them joking that they've "completed the set"
Draco coming to them for help and them facing and taking down Voldemort together
Friendship between houses (≧▽≦)