The story could develop by focusing more on the friendships and rivalries among the other Gryffindor students. For example, Ron and Hermione might have to step up and take on more leadership roles within the house without Harry around.
It could be that the writer wants to explore different character dynamics within Gryffindor without Harry overshadowing them. Maybe they want to focus on the other Gryffindor students' growth and relationships that are often in Harry's shadow in the original story.
The story may take a turn where Harry becomes a sort of mediator between the houses. Since he has left Gryffindor, he has a different view and can help bridge the gaps between the different groups in Hogwarts. He might also embark on a personal journey of self - discovery outside the framework of Gryffindor values, which could lead to new magical abilities or insights.
After leaving Gryffindor, Harry may embark on a journey of self - discovery. He could travel to different places, learn new magic, and meet new characters outside of the Gryffindor - centric environment. This new path could lead him to discover a new purpose or a new way to fight against the forces of evil that doesn't rely on the Gryffindor identity.
When Harry is adopted by Poppy, it might lead to a change in the main plotlines. For example, Voldemort may not target Harry in the same way. Since Harry is under Poppy's care, he could be better protected. Poppy might train Harry in some unique forms of magic related to protection and healing. This could make Harry a more well - rounded wizard earlier in his life. And his relationships with other characters would also shift. Teachers might view him differently as he is now associated with Poppy, a respected figure at Hogwarts.
When Harry Potter gets the Infinity Stones in the fanfiction, the story could take many interesting turns. For starters, he might use the Time Stone to go back and learn from the greatest wizards in history, thus becoming an even more powerful wizard himself. He could also use the Space Stone to explore unknown magical realms and bring back new forms of magic to Hogwarts. The story would also likely involve a lot of moral dilemmas for Harry, as the power of the Infinity Stones could corrupt him if he's not careful. His friends would play an important role in keeping him on the right path while he navigates the new powers and responsibilities that come with the stones.
Often, the betrayal is sudden. For example, if it's his friends who betray him, it might start with a small incident that Harry doesn't think much of at first. But then it snowballs into a full - blown situation where his friends turn their backs on him completely. Then Harry has to struggle to deal with this new situation while also facing other threats in the wizarding world.
Maybe he stumbles upon it during a time of great danger in the fanfic. For example, when facing a powerful dark wizard, he might feel an unusual warmth and strength within him, and then realizes it's the power of the Gryffindor flame.
He might seek refuge in another house. For example, he could try to convince the Hufflepuffs to take him in. The Hufflepuffs, known for their acceptance, might be his best bet. This could lead to a whole new set of relationships and storylines as he adjusts to a different house environment.
When left alone in his 4th year in the fanfic, Harry's character would experience a significant shift. He would be forced to face his insecurities head - on. This could make him more confident in the end as he overcomes them. He may also develop a different relationship with his professors as he has to seek their help more directly without his friends to act as intermediaries. His social skills might also change as he has to interact with other students in a new way, since he no longer has his usual group to rely on.
Well, he might face a lot of opposition from his former Gryffindor mates. They could see his renouncement as a betrayal of the house. This could lead to some tense confrontations.