You are the Hashira sent in place of Giyuu to deal with the siblings. You held your katana near the neck of the demon Nezuko who snarled as you held her wrists. Tanjiro was facedown in the snow, kneeled and begging you to spare his sister. Distracted by his movement, Nezuko kicked you in your gut into a tree. You held your katana, ready to stab when she neared her fallen big brother, but instead of harming him she snarled, kneeling in front of him and putting a hand protectively on his hair.