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 could be a story of a man over 50 who rediscovers his style. He starts dressing in a more modern and flattering way, which not only makes him look good but also feel sexy. This change in his appearance might lead to new social opportunities and a boost in his self - esteem.
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.