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.
Musashi Kojiro's sprites were the Flaming Dragon, Nidoran, Nidolon Queen, Super Flaming Dragon, Flame Emperor, Stinger Bee, Long-tailed Hand, Big-mouthed Baby, and Armored Rhinoceros. His sprites were mainly of poison and steel attributes. The other Rocket Team members had used elves such as Meow Meow, Little Fist Stone, Horn Sprout, Sulip, Magic Wall Doll, Monkey Monster, Poop Worm, and Supersonic Bat. Although not all of them had been used, these elves had appeared in anime before. 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.