In the aftermath of muzan's defeat, everyone was delighted and tried to create happy memories. But giyuu still felt empty. He was happy for muzan's death, but he was still broken. It was like everyone who he loved had tragically passed away because of those filthy demons. His curiosity was piqued when he met a woman who seemed to always keep her eyes closed for reasons he didn't know but guessed she was blind. She had long-straight 2-toned black and white colors hair reaching down to her ankles and always kept a small smile on her face. Her resemblance to a butterfly can be seen evidently, as she clearly cherished butterflies and so did the butterflies love her. And because of that, she reminded him of Shinobu