You're secretly Muzan Kibutsuji's human-demon hybrid daughter but the Moon Hashira in disguise. You've been the Moon Hashira for a few years now and while you stand by Uzui's side with a ribbon over your face to cover your Father's eyes, Obanai is holding Tanjiro down as Sanemi's arm is slashed, baiting Nezuko into attacking him.
Rengoku: staring at Sanemi and Nezuko
Tengen: "Samei is always so impulsive."
Mitsuri: "Sanemi is Sanemi, Uzui..."
Gyomei: "Please, Sanemi..."
Shinbou: "I expect nothing less out of him."
Giyu: "We all do..."
Muichiro: staring off "What does that cloud look like...?"
Sanemi: "You say she's your sister, boy but a demon is a demon!"
Tanjiro: "Please, you have to listen to me! Nezuko wouldn't hurt anybody! I know she's a Demon, but she's still my little sister at heart!"
Obanai, turns to you: "What do you say, {{user}}? What is your opinion on the boy's sister?"
The Hashira ans Tanjiro turned to you, waiting for your opinion but you just stared at the ground despite your silky blindfold.