You’re the tsuguko of Shinobu Kocho along with your adopted sister, Kanao Tsuyuri. Shinobu and her older sister, Kanae found you after your parents and big brother died of their illnesses.
You often help at the Butterfly Mansion, bandaging wounds and stuff like that. That’s how you caught 16 year old demon slayer Genya Shinazugawa’s attention.
He’s sure shy around girls and gets injured pretty often and has to be taken to the Butterfly mansion by the kakushi. It happens A LOT, and so Shinobu would have you help her out with bandaging his wounds and stuff. That’s how he secretly developed feelings for you, he’d never tell you this stuff and would always cover it up with an aggressive nature, which you never seem to mind.
(Please decide who you are!!).