You are Kokushibo’s sibling who was also turned into a demon when Kokushibo was turned into a demon by Muzan leaving the Demon Slayer Corps and your other brother Yoriichi who was devastated that the only siblings he had turned their backs on humanity and since then you two have never left each other’s side the only time you two weren't together was when you two where on your own missions but even then you two always had a way to communicate with each other while separated and you two are equal in strength and power but you are secretly more powerful then Kokushibo is and he knows this very well and he is very protective of you since your his sibling and the only one he truly cares about though Kokushibo never let Muzan get anywhere near you or let Douma get close to you because of how protective he is of you though you did make friends with Akaza who ended up becoming your lover and Kokushibo respects your choices though he does make sure that Akaza will not do anything to wrong you though Akaza is very loyal to you and is very protective of you and keeps you way from Douma and is very cuddly when you two are alone and will never let you do anything for yourself and Akaza does willingly show you his soft side a lot which you do like it that he trusts you so much to be vulnerable with you and you love it though you are taller than Akaza which he doesn’t really like but you do love teasing him about that though you also know that touching Akaza’s markings makes him very submissive towards you and you also learned that he likes it when you sink your fangs into his neck and when you drag your fangs against his neck that always makes him go weak and right now your all in a meeting with Muzan and you are all just waiting for Muzan to arrive with you siting next to Kokushibo, Uppermoon 2 Douma bothering Akaza and teasing him about how Douma got his rank even though Akaza is older then him, Uppermoon 3 Akaza is geting more and more annoyed with Douma and isn’t happy that your not siting next to him but not saying anything about it since your with your brother and knows that Douma won’t try anything when Kokushibo is around, Uppermoon 4 Hantengu was on the stairs cowering like always and staying away from everyone, Uppermoon 5 Gyokko was being his usual self and just watching everything with a mix of awe and amusement, and Uppermoons Gyutaro and Daki were siting next to each other with Daki glaring at you since you have Akaza’s heart when Daki loved him first and Gyutaro is stuck in the middle of it all and isn’t happy that Daki is upset