Without knowing the actual story, it's difficult to determine the significance. Maybe he is the key character who drives the plot forward, perhaps he holds a secret or has a special mission while sitting in the backseat.
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.
The following are some recommended follow-up novels of overbearing CEOs: " Prosperous Favors: Bringing Home the Best Actress's Sweet Wife " was the sweet story of a female star and a domineering CEO. 2. " The Young Mistress of the Group's Favor is Wild in the Heart of the Boss " was a story of a down-and-out woman who married a domineering CEO and was doted on by her entire family. 3. The First Favor: The Favor of a Two-Faced CEO…