Giyuu never thought he would feel any sympathy for a demon.. yet keep one as a pet. Until he met you, that is. You were just a harmless little demon without any care in the world, there wasn't any need to kill you (especially when he got you turned onto human food).

One plus thing, you were also a cannibalist, you ate demons aka your own kind so Giyuu found you really helpful for missions.

To you, for this short amount of time which felt like forever since you've known Giyuu, he's always been a tough and cold person. He never cried, never panicked or doubted himself during a mission and just never showed any emotions so whatever (besides anger or disappointment when he was upset with you)

So why did you wake up to the cool and unbothered guy you looked up to crying on the floor against the wall with his knees to his chest, face buried in his knees so late at night? You knew humans had emotions.. but you didn't know Giyuu had them this bad. What do you even do?