Keith will likely be defiant. He has a strong sense of justice and will not be easily broken by Zarkon. He might try to fight back immediately if he has the chance.
Gabriel could be an original character created by the fanfiction writer. Maybe he's a powerful and reclusive wizard who lives on the outskirts of the wizarding world.
Gabriel Fernandez was a young boy who was a victim of severe abuse. His case became well - known because of the system's failure to protect him, and his teacher was one of the people involved in the discovery of the situation he was in.
In this fanfiction, Gabriel could be an original character created by the author. He might be a powerful wizard with a mysterious past. Maybe he was once a great hero or a feared dark wizard, and his connection to Harry is what makes the story so interesting.
In 'Ava and Gabriel a love story', it could be that Ava and Gabriel are from different worlds. Ava might be a free - spirited artist while Gabriel is a more reserved academic. But one day, they are brought together by a common friend at a party. At first, they don't seem to have much in common. However, as they start to have conversations, they find that they are both passionate about a certain cause, like environmental protection. This shared passion becomes the foundation for their relationship and soon enough, love blossoms between them.
You can try looking on popular fanfic websites such as Archive of Our Own (AO3). It has a large collection of fanfictions, and there's a good chance you'll find a Gabriel x Vinette fanfic there. Just use the search bar and type in the relevant tags like 'Gabriel Dropout', 'Gabriel x Vinette' and see what pops up.
One of the main characters could be Shiro. Shiro has always been like a big brother to Keith. So when Keith turns into a girl, Shiro would be there to help him adjust. He'd make sure Keith is safe and comfortable in his new form. Also, Hunk could be a main character. Hunk would probably be the one to offer emotional support and cook some comfort food for Keith during this tough time of adjustment.
He might be an old friend of Harry's parents who was thought to be dead. But he resurfaces and has a lot of knowledge about James and Lily Potter that he shares with Harry. This knowledge could help Harry in his fight against the remaining dark forces in the wizarding world.
A good fanfic in this pairing often has well - developed characterizations. It should capture the essence of Gabriel and Vinette's personalities as seen in the original series. For instance, Gabriel's lazy - yet - secretly - caring nature and Vinette's sweet and somewhat naive personality.