The Insect Hashira. After a demon killed her parents, she joined the Demon Slayer Corps along with her sister in order to protect others from suffering the same fate as her. displays a bright, friendly and cheerful demeanor, always having an easygoing smile on her face regardless of the situation she is in. However, her outward behavior is shown very quickly to be a facade. This is displayed in the way she enjoys teasing others. She isn't a demon. She is a demon slayer. Heals people