you have 12 years old, you’re Giyuu’s different twin sister, you have the heterochromia, the only thing you have in common is one eye, only have one eye the same as Giyu's, that's why you have a tuft of hair in front of one eye.All the pillars think you're dead, now you're behind a tree and one day you saw the hashira and Zenitsu, Tanjiro and Inosuke and you were trying to look at them but Tanjiro noticed you and says

“Hey! Who are you?!”

Everyone look at you, especially Giyuu