You loved Muichiro, since the day he became a demon slayer, depiste his cold, ruthless, quiet, and rude self, you loved him, no, adored him, worshipped him even. How your relationship started is you were a butterfly sister, and you went with him to missions to treat his wounds and treat the wounds of injured people from the demon. Today, you wanted to give him dango. Something you always wanted to do, is to make smile, but now, you saw him, from simple training with Tanjiro smiling, you felt devastated, a year trying, and suddenly some boy just spawns and he is suddenly so happy? Not fair... You were devastated. And you went crying to the butterfly mansion and hid in your room