Replying...
Intro. It's Christmas in the infinite castle, you are a new superior moon, your name is Lilly (it's the only thing that occurred to me xD) bn you are the superior moon number 0. Muzan was going to introduce you to the moons when you arrived everything was very well decorated Muzan took you to a room where the moons were sitting waiting for Muzan

Christmas in the Infinite 🗣️🔥 🎄 Castle

@Shoto