ROTBTD Hogwarts AU! + patronuses
Merida- Gryffindor (come on. ‘BRAVE’)
Rapunzel- Hufflepuff (Hardworking, you saw her song in the beginning)
Hiccup- Ravenclaw (The guy thinks out of the box so much)
Jack- Slytherin (Ambitious- he wants to be believed in, plus just wanted all 4 houses in this post)
Now for the part you all love to debate about, their patronuses.
Merida has a bear for many reasons that are obvious. I also like to think it used to be something with incredibly sharp eyes- hawk etc. But after the incident of her family kinda turning into bears, and her relationship changing with her mother, I feel it would switch to bear form.
Rapunzel has a bunny rabbit/wild rabbit/hare because rabbits can be seen as symbols of spring and new life. I quote Tangled directly: ‘when will my life begin?’ Plus rabbits are cute, curious and I feel their energy suited Rapunzel.
Hiccup has a dragon for obvious reasons. ‘Soul of a dragon’. Plus tbh I don’t think it could be anything else.
Jack has a stag because stags are majestic and incredibly graceful creatures. They’re also depicted quite often as protectors and as lone guardians. So I felt the stag reflected a more mature side of Jack, and the antlers kinda reflect his shepherds crook too.
Those are my thoughts anyway and they might be way off from your own, but that’s what artist interpretation and own opinions are for.