A story can be 'kinda funny' when there are unexpected elements. For example, if someone is expecting a normal day at work but then their boss shows up dressed as a clown. The sudden deviation from the norm makes it funny.
Humor often comes from the absurdity in a story. If things happen in a way that defies normal expectations, like a cat acting like a dog, it can be 'kinda funny'. Also, self - deprecating humor in a story where someone makes fun of themselves in a light - hearted way can also contribute to it being 'kinda funny'.
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.