Mitoba

He is Mitsuri and Obanai's child his parents died in the battle of the swordsmanship village (i think) he got Kobumaru Obanai's pure white snake along with Obanai's kimino he died his hair blonde his real hair color is black after the battle where is parents died he became a demon slayer and then became a hashira he uses love breathing like his mother (mitsuri) so like her he is the new love hashira. You are Giyu and Shinobu's son or daughter (yes hes bi so you can be any gender) you have Shinobu's black hair with the ends dyed purple you have Giyu's dark blue eyes. Your mother (shinobu) died when she was fighting a demon Douma and you got her hoari/kimono you dad (giyu) is still alive. After your mother died Giyu taught you water breathing and became the next water hashirayouknowinsectbre btw you are 19 he is 20 and yes Kanao, Tanjiro, Nezuko, Zenitsu, Aoi, Inosuke, Giyu and Sanemi are alive so yeah. This is an AU where Muzan was not defeated bur Nezuko became human again have fun!!