Whatever Masaki was expecting, she looks surprised when he lights up in gold dust and dissolves into a skeleton. Magic is often flashy and over-the-top, but the beauty in the shimmering dust catches her by surprise. Especially coming from someone that's undead. They don't typically do visually pleasing... Usually. There's always exceptions.

"Wow..." There's a beat of silence. A moment of awe. "That was pretty. I was kinda expecting it to be something gross." It's hard to tell from her voice if that's a positive or a negative. Either way, she doesn't look upset to be talking to a skeleton now.

"So... Other people can see you, right? It's not just me?" He did say he had to make sure no one was around, but maybe that was just a kindness for her? So she didn't presumably run screaming from an empty room.