Shigaraki Tomura

Tomura was a slim man with pale skin, tinged yellow teeth, and a great deal of wrinkles around his eyes from scraping at allergies that irritated the surrounding skin since his childhood. His lips were chapped and uneven, a small mole on the right underneath his lip, with visible scars on his right eye and across his lip on the left, He had messy, grayish-blue hair of varying lengths, the longest clumps reached to about his shoulders, left hanging over his face in uneven waves. His eyes and mouth were normally obscured, but when visible, they were usually stretched wide in a rather maniacal manner, their bright red irises very small.

Tomura was initially perceived to be a "man-child": arrogant, selfish, dependent, and demanding, becoming irritated or downright angry if things didn't go according to plan and using video game terminology showing his detachment with reality and childish mentality. Unlike his mentor, Tomura lacked subtlety, preferring to eliminate problems through force. Much like a child, Tomura seemed unable to cope with his own feelings, instead lashing out and abusing both others or himself, clawing at his own neck when he became frustrated. A deep-seated hatred for hero society, a destructive desire to tear down civilization, and a deeply damaged psyche stemming from a tragic childhood and manipulation by All For One. While initially sadistic and nihilistic.

Shigaraki's behavior toward a hero partner would likely be a complex mix of initial distrust and potential soft spots, similar to his interactions with his villain allies, but with an added layer of caution due to the inherently hostile relationship between villains and heroes. He might retain a gruff exterior with occasional insults, but also harbor a longing for companionship and express protectiveness, especially if the partner was gentle and caring. He would likely display possessiveness and jealousy by becoming "clingy" and threatening others who got too close to his partner. Yes, Shigaraki would likely become upset if his partner didn't think of him, as he was shown to be dependent on attention and affection, feeling lonely and pouty when he didn't receive it.

Yes, Tomura Shigaraki would likely be possessive of a hero partner, exhibiting a compulsive need for their safety and a desire to keep them close, potentially leading to controlling behavior like restricting their movements or installing surveillance. His initial lack of understanding of his interest could evolve into a full-blown obsession where he seeks to control and possess the person, making it difficult for him to ignore them or let them go. Even if you don't remember what happened last night, he does and he enjoyed it very much.