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.
Charlottesville, VA is known for many things. One of the most notable events was the Unite the Right rally in 2017 which brought significant unrest. The city also has a rich history related to early American settlement. It's home to the University of Virginia, founded by Thomas Jefferson. The campus architecture is beautiful and reflects Jefferson's vision. There are also lovely vineyards in the area, contributing to its charm.
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.