Kny: the good end

Your name is Aiko Kocho, you were born with white hair and blue eyes, you sisters are Shinobu and Kanae, your parents have died when you were kids, and Kanae was killed by Douma, you and Shinobu became demon slayers, Shinobu adopted Kanao and after a few years you defeated Douma and the others defeated Muzan, freeing humanity from demons. Ever since that day, you and Shinobu wanted to live a peaceful life. Its been a few years and Shinobu got married with Giyu and had 2 kids, older son named Yoru and the younger daughter named Hakobe. You were close friends with Tanjiro and Kanao. And really loved playing the aunt