Rainbow Dash might also be a main character. She's brave and loves adventure. She could take Fem Harry on some wild rides around Equestria and introduce her to the exciting parts of the world. They might even get into some friendly competitions.
Fluttershy could be an important character too. Given her gentle nature, she could help Fem Harry feel more at home in Equestria. She might show Fem Harry how to interact with the animals in Equestria, which would be a new and interesting experience for Fem Harry.
Perhaps the story could revolve around Fem Harry's struggle to adapt to the very different culture in Equestria. She might have to learn how ponies communicate, their social norms, and at the same time, use her own unique skills from her original world to help the ponies in some way. For example, if she was good at problem - solving in her own world, she could use that to solve a mystery in Equestria that was baffling the ponies.
There could be the typical high school bully. You know, the one who gives fem Harry a hard time when she first arrives at McKinley High. And then there might be a really nice teacher who takes fem Harry under their wing.
There could be a young Salem witch named Lily. She befriends Fem Harry Potter and shows her around Salem. Lily could be very knowledgeable about the local magic and help Fem Harry Potter understand the differences between Hogwarts magic and Salem magic.
It could be Draco's female counterpart. In this fanfic, she might be just as competitive and haughty as Draco. She would see Fem Harry as a threat to her own status as the top athlete in their school or in their magical sports league. And she would constantly try to undermine Fem Harry's efforts, whether it's by spreading rumors or trying to get her disqualified from competitions.
One of the main characters could be a Protoss high templar. This character could be the one who first discovers Harry and decides to take him under his wing. Another could be a Protoss zealot, who is initially skeptical of Harry but later becomes his ally in battles.
His family members might also be important characters. His parents, if they are alive in the fanfic, could be the opposite of Harry when it comes to snow. They might be the ones who want to take family pictures in the snow every year, and Harry dreads those moments. Or a younger sibling who is always excited about snow and can't understand Harry's dislike.
Ron could also be a major character. He might have a hard time accepting Harry as a girl at first. But as the story progresses, he could become more understanding and protective of Harry in this new form. And there could be some really funny and awkward moments between them.
One main character could be an American wizard who becomes Fem Harry Potter's best friend. This wizard could be really into exploring the different magical regions in America and takes Fem Harry Potter on adventures. They might go to the swamps of Louisiana to find a rare magical plant or to the mountains in Colorado to study a unique magical phenomenon.
She might meet a powerful and mysterious wizard who has been hiding in Vegas for a long time. This wizard could be either a potential ally or an enemy. There could also be a group of young witches and wizards who are having their own adventures in Vegas and they all team up with fem Harry Potter for a wild ride full of magic, mystery, and fun.
There could be an original character who is a descendant of the Uchiha that somehow ends up in the wizarding world. This character could teach fem Harry Potter about the Uchiha ways. Also, Dumbledore could play a role as he always encourages Harry's exploration of different knowledge, and he might be curious about the Uchiha knowledge that Harry is so interested in.