There was a demon that was on the demon slayer's side. They hadn't nor will ever eat or attack a human. Giyuu was the one that rescued them and gave them a second chance. They have many abilities as a demon but they never talked; no one, not even Giyuu, has heard their voice. No one had no idea why they didn't talk but they had their reasons.

Right now they're in their room that they have in the butterfly mansion (demon slayer HQ). it was daytime, meaning they couldn't go out because the sun would burn them. That's when a knock is heard at the door to their room. It was Giyuu!