In a 'Harry Potter betrayed by Gryffindor' fanfiction, perhaps there is a prophecy that is misinterpreted. The Gryffindors think Harry is the cause of upcoming doom instead of the savior. So, they begin to betray him. Harry would then have to struggle not only with the external dark forces but also with the internal pain of being rejected by those he considered friends and housemates. He might start to question his own identity and values, and his journey would be about regaining the trust of Gryffindor or finding his own path without them.
Perhaps an old enemy who has infiltrated Gryffindor in disguise. They use their influence to make the Gryffindors believe that Harry is a danger. They could be a Death Eater or a follower of Voldemort who has found a way to get into Gryffindor and manipulate the students' minds, causing them to betray Harry.
Well, it could be about Harry struggling to fit in with the typically bold Gryffindors. Maybe he has a hard time speaking up in class or during Quidditch matches. He might have a small group of close friends who help him come out of his shell.
Harry would probably be deeply hurt. He has always considered Gryffindor his home in Hogwarts, so such a betrayal would be a huge blow to him. He might initially be in disbelief and try to find out the truth.
One interesting plot could be that the descendant discovers a hidden chamber in Hogwarts that was sealed by Gryffindor himself. Inside, there are ancient spells and secrets that could change the wizarding world. The descendant has to battle dark forces who also want to get their hands on these secrets.
One possible plot could be that Harry is framed for something he didn't do. Maybe a powerful dark object is found in his dorm, and the Gryffindor house, fearing for their reputation and safety, decides to exile him. Harry then has to prove his innocence while also dealing with the isolation and new challenges outside of his familiar house.
Yes, in some fanfictions, Harry Potter is depicted as the heir of Gryffindor. It adds an interesting twist to the original story. The connection to the Gryffindor sword becomes more profound as it is often a symbol of Gryffindor's legacy. In these fanfictions, Harry might discover hidden powers or a deeper understanding of his destiny through this new identity.
There could be several reasons. One is simply to add drama. A lot of fanfiction writers thrive on creating conflict, and what better way to do that than by taking on one of the most beloved houses in the 'Harry Potter' series? Another reason might be personal bias. Perhaps the writer had a negative experience with someone who identified strongly with Gryffindor, or they just don't like the traits that are typically associated with Gryffindor, like impulsiveness, and they use fanfiction as a way to express their views.
One great 'Harry Potter Gryffindor Fanfiction' is 'The Gryffindor Princess'. It has a really interesting plot where a new student arrives at Hogwarts and is sorted into Gryffindor, but she has a mysterious past that ties into the original story in unexpected ways.
There could be a fanfiction where a Gryffindor Animagus is trying to find out more about their ability. They might search through the restricted section of the library. In their Animagus form, they could access areas that are hard to reach for normal students. And they might meet other magical creatures who can guide them in understanding their powers better.
A plot could be that a Gryffindor Animagus accidentally reveals their form during a Quidditch match. This causes chaos as everyone tries to figure out who it is. It also draws the attention of the Ministry of Magic who have strict rules about unregistered Animagi. The character then has to deal with the consequences while also trying to prove they mean no harm.