Can a Certain Sunflower Attend a Party?

This is a question for anyone who would know

So the Moresca ball is coming up very soon, and to this ball I will be bringing my partner who has never been to a game before, the idea is that he will be attending the ball as the human version of my sunflower staff Solar Stephenopolis III (aka Steve). This would very much be like a Cinderella situation where he is only human for the ball, a Steverella if you will. So my question was is there an in game situation where that happening would make sense and is there anything that would block that from being a possibility? basically is that a thing that could happen ?

I also want to be clear it wouldn't be a recurring character at regular games it would JUST be for the ball.

Thanks

-Sunflower girl