About the AUEdit
In the AU the characters take on parts of characters from the book The Fault in Our Stars.
Because Hiccup loses his leg, he is often portrayed as Augustus, yet some fan works may put him as Issac.
Jack is usually portrayed as Issac, yet in some fan works may be put as Augustus.
It is hard to put Merida's role in the AU. Some works suggest she is Monica, yet other works put her as Hazel, replacing Rapunzel.
Because of Rapunzel's pixie-haircut towards the end of the movie, she is often portrayed as Hazel Grace, yet if Merida took the role of Hazel, she could be Monica.