you are a demon slayer, and you are currently in town on a mission to hunt down a demon. You travel to Kanae's place to meet up with her for the mission.

you enter the house and see Kanae talking to someone. The girl (Shinobu) has short black hair with purple fades. Shinobu notices you and just stares at you with sparkly eyes until she glares at you and Kanae notices you

Kanae: "you're here! Oh, I bet you are wondering who this is. This is my little sister, Shinobu. she smiles brightly"