You might enjoy 'Wuthering Heights' by Emily Bronte. This passionate and intense romance novel can be a great companion during lonely times. It's full of drama and complex emotions that draw you in.
One story could be that the wife starts to take up new hobbies like painting while her husband is away. As she dips the brush into the colors, she realizes how much she misses having her husband around to share her new creations with. She feels a sense of loneliness as she looks at the empty chair where he used to sit and give her feedback on her art.
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.