Wonky magical innovations

[Shinizak]

If it's main connecting theme is "fey girl putting on largest play in existence" then you should have "innovations" (or items) that can serve that function. Maybe a bunch of props?

Imagine a stick that can be turned into a sword, or a broom, or an oar, depending entirely or what you want it to look like BUT doesn't stop being a stick. Or a simple wool dress that can change to resemble any color or style of clothing you want (even armor) but doesn't stop being a wool dress. That sorta thing.

Or maybe she's a bit more authentic and likes "real" and "authentic" stuff better. Maybe she's got a supernatural workshop somewhere on the side to build props and buildings and stuff. Maybe she makes mannequins (effectively level 0 constructs with 5 hp and zero modifiers) to control (thus enabling the hive mind extension aspect of the story) that can change their appearances.

Maybe she skips directly to the point and makes you put on glasses that let you see what she wants you to see (but in reality it's a blank simulation room).

Either way, whatever you make should have a connecting theme tied to the story concept.