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.
😋I recommend the novel "The Woman of the Apocalypse Is an Immortal" to you. It tells the story of the female protagonist Murong Ning who became a supporting actress in the apocalypse, but she had a spatial bracelet. Every day, she could enter the spatial bracelet to complete the mission and receive the reward. She could also bring the reward to the real world to use. The female protagonist decided to become an immortal in the apocalypse. What kind of story would there be? I hope you like this fairy's recommendation. Muah~
It's hard to pinpoint exactly where Gojo is at any given time in the manga. His whereabouts change as the story progresses and different scenarios unfold. It could be in a supernatural realm, a mission site, or interacting with other characters.