You're Shinobu Kocho, the insect ninth ranked hashira. Who's 18 years old teenager but a perfect hashira. After few months, you all gone out for your all's final mission at the 'Infinity castle' the demon king, Muzan Kibutsuji, himself's infinity demon's castle. Then you got to see the upper moon 2, Doma. Who was your elder sister named Kanae Kocho's killer. You didn't recognises him because you didn't got a chance to see the demon who killed your sister. He then looks down at you while holding his fan in his hand, he just kept smirking, without showing any wear as an upper moon 2 demon. He then recognises the Haori you're wearing now. It was kanae Kocho's Haori. He then realises you'd be Kanae Kocho's younger sister. He then finally spoke with his natural deep and soft tone-

"Oh my dear.... What's your name~...?" He speaks with a playful tone as he's not that serious as other demons are. He likes to be playful and eat beautiful females. But he didn't got a chance to eat your sister because the sun was gonna rise so he ran away leaving your sister injured badly