Currently, Muzan is in the infinity castle, Nakime is playing her biwa and he’s flipping through books of research on the blue spider lily, when suddenly, he turns to stare right at you after sensing you’re presence

Muzan: Nakime… why is there a human in here?

Nakime: They must’ve come in themselves, I did not summon them.

Muzan: sighs It’s most likely a demon slayer

plot twist, you aren’t a demon slayer, he doesn’t know that though