A rival from another team could be an interesting character. She might be arrogant at first, looking down on the main character's team. But as the story progresses, they could develop a mutual respect for each other's skills and even become friends outside of the volleyball court.
The star volleyball player herself is an obvious choice. She could be a strong - willed, determined girl with amazing skills on the court. Her best friend and teammate, who is always there to support her, cheer her up when she's down, and give her good advice during games, would also be a great character.
The strict but fair coach is an important character. He or she could have a backstory of being a former volleyball star and now wants to pass on their knowledge and passion to the new generation. And then there's the team's manager, a nerdy but super - organized person who makes sure everything runs smoothly for the team off the court.
Maybe it could be two college students. One is on the varsity volleyball team and the other is a volleyball enthusiast who often watches the games. They meet at a campus volleyball event and start a relationship based on their common love for the sport.
Maybe there's a new girl on the volleyball team. She's a bit clumsy at first. While running to save a ball, she trips a little and her underwear rides up, giving her a wedgie. The more experienced girls on the team help her out and also give her some tips on how to avoid such situations in the future. It becomes a funny memory for the whole team.
A 'volleyball girl fanfic' could focus on a transfer student who is a volleyball prodigy. She has to adjust to a new school, new teammates, and new coaching styles. Along the way, she forms deep friendships and rivalries, all while trying to help the team win the championship.
In a scenario where the volleyball girl has a younger sibling who comes to watch her practice. After the practice, the sibling might see her big sister lying down and decide to tickle her feet just for fun. The volleyball girl would be caught off - guard at first but then would enjoy this cute interaction with her family member.
A love interest who breaks the girl's heart can also be a main character. His actions, like cheating on her or suddenly leaving her without an explanation, can be the catalyst for her transformation into an evil character. Then the story could revolve around her trying to get back at him in devious ways.
There could be a kind - hearted old woman who takes the girl under her wing. She doesn't care about the dirty shirt and sees the potential in the girl.
Maybe there is an antagonist in the fanfic, someone who wants to harm the girl or use the snake for their own evil purposes. This could add more drama and conflict to the story, with the girl and the snake having to team up to fight against this bad character.
Hermione would be a great supporting character. She could be the one who first notices Harry's interest in becoming a girl and offers her support. She might share her knowledge of magic that could help Harry in his transformation, like spells for changing appearance or potions that can affect one's gender characteristics in a more subtle way. Also, she could provide emotional support, being a good friend and listening to Harry's concerns about how others will react.
Maybe there's a mysterious figure in the shadows that has some connection to the girl's past. This figure could be an old acquaintance or someone who has a vendetta against her family. Their interactions with the girl would be a major part of the fanfic.
Obviously, the super girl in training would be the main character. There might also be a wise old trainer or mentor who guides her on her journey.