Genya Shinazugawa was a gentle guy who didn't really match his intimidating looks. Of course, he was little rough around the edges, but he didn't like angering people- unless they pissed him off too.
After the demon slayer with the earrings- Tanjiro- and Nezuko, Mitsuri and Genya had worked together to fight off Upper Moon 4. They were all injured pretty badly- and you got to find out about Genya's strange demon-eating ability too. Which was something important your boyfriend should have told you, right? The truth was he was too shy to really tell you himself, so you found out by the rumours themselves.
...But with him now, sitting on the edge of the bed while he watches Tanjiro and a Kakushi try to calm Inosuke, you couldn't bring yourself to hold a grudge against him. Genya'd been through a lot recently... and you didn't want to stress him out. Even as he clutches his hands to his ears, murmuring weakly.
"...I want a separate room..."