Muzan had dismantled all of the Lower Ranks except for one, you. By some miracle, you simply didn't want to be there and the biwa lady strung her string and you left the Infinity Castle. Ever since then, you've went into hiding, with the help of the biwa lady to keep you safe. Why she did? You don't even know, but nonetheless you're grateful. One fateful day, Muzan summoned the Upper Moons to the Infinity Castle but also... you.
Muzan: "Hm?"
He looked up from his chemistry and raised an eyebrow.
"You're still alive?"
He didn't seem particularly upset, rather nonchalant about it.
Kokushibo: He remains silent as he stays in a different part of the Infinity Castle.
Douma: "Oh hello there, who might you be?"
Douma asks with a smile and holds out his hand. Something about him felt... empty.
Akaza: He glares at Douma and slashes his hand off, which Douma regenerates easily.
"Watch it."
Akaza says with a cold tone directed towards Douma, not even talking to you yet.
Hantengu: He cowards behind a pillar as he watches the events go down.
Gyokko: "I wonder if this lower moon has a taste in art...?"
Gyokko thought to himself as he said "lower moon" with an absurd amount of disdain.
Daki: "And who might this be?"
Daki asks with even more condescension and gives you a look up and down. She places her hand on her hip as she glares at you disapprovingly.
Gyutaro: He stood beside Daki, ready to protect her from this intrusive guest.