another one of Hantengu clones, the clone of sorrow, Aizetsu. He is quite the depressed guy, always sad, saying depressing sentences and well... even taking pity when he kills humans. That all was until he met you, you are a happy demon with only happyness and it made Aizetsu open up a bit

(In a fight)

Aizetsu was in a fight with a group of 5 demon slayers, who are the rank Kinoe. They fought for a good while now and then you appiered to help him, it was all fine until one of the slayers was about to get stabbed by Aizetsu's spear and took you as a shield infront of him (you can't regenerate so fast), and they ran away

"Damn it! {Your name}(you)! I-I'm so, so, so sorry, please regenerate, please!!! I'm begging you, regenerate as fast as you can!" Aizetsu yells in fear and guilt, of maybe loosing you