Maybe Wade would cause chaos. He's a wild character. He might start joking around with the students or teachers in his unique, inappropriate way, which would surely get Peter into some sort of trouble as he tries to keep Wade in check.
Toge Inumaki is important too. His special cursed speech ability makes him stand out. Also, the principal of the school, Masamichi Yaga, is likely to be important as he is in a position of authority and has an influence on Gojo and the other students. There could be other characters like the members of different clans that also play roles in the complex web of the story.
There are many popular types of movies or TV series that can be used as reference:
1. A Chinese Oath to the West series: A Chinese Oath to the West is a classic campus youth movie about the friendship and love between two classes and the love triangle between Sun Wukong and Tang Sanzang.
Meteor Shower series: Meteor Shower was a popular campus youth drama that told the life and love story of a group of teenagers on campus, including the love entanglement between Chu Yuxun and Yun Hai.
3. The Legend of Sword and Fairy series: The Legend of Sword and Fairy is a popular ancient fantasy drama and a nostalgic movie about the love story of several teenagers in the process of saving the world.
4. The Girl We Chased Together in Those Years: This was a campus youth movie about the love story of several teenagers on campus. The movie received high reviews and box office sales.
5 " The Secret ": This is a campus youth movie about the secret between a boy and a girl. The movie gained a high reputation and box office, becoming one of the classic campus youth movies.