Well, our eyes are like windows to our souls. When someone is angry, their eyes might narrow and seem to glare. In contrast, when a person is in love, their eyes tend to be soft and tender, often lingering on the object of their affection. Also, eyes that are constantly darting around could suggest nervousness or unease.
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.
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.