"Maybe it's the transformation you'd do as a girl."

...

.......

"Maybe it is that."

"I mean, it's sort of the obvious thing if you have the right background context? I've heard of magical girls having multiple transformations and I've never heard of non-transformed magical girls doing things other than transforming. You showed up yesterday and do not have the right background context."

Other magical girls have multiple transformations? For reasons other than gender?

"You're not the only nonbinary magical girl in existence."

Cool, I wanna meet them!

"Sure. Preferably at some time when I have a better reason to introduce you than 'my also-an-enby genderfriend thinks the fact that you are an enby is shiny.'"

One: it's adorable the words 'enby' and 'genderfriend' exist. Two: of course it's shiny, I've never met another one and I suspect this has to do with population size. Three: the fact that you just implied I'd be your genderfriend might just be enough to make this sentence the best sentence anyone's ever said to me.

"Aww. Well, we agreed to go on a date and appear to be getting along swimmingly, it seems likely!"

"Eeeeee."

"Also you're adorable."

He keeps grinning. I should try to shift into a girl to experiment, maybe.

"Maybe!"

Okay I can now generate mana so -

He starts speaking in his language, and of course the meaning is clear via telepathy: an extended and detailed description of himself as a girl, with even a few biological details.

Nice.

And then, of course, he is a girl. 

...A very cute girl.

I'm not sure how I should feel about the way you prefer this shape to my other one.

"I don't strongly prefer it on an absolute scale, I just haven't seen it as much so it's shinier."

Fair enough, I guess.

And if she tries to transform—

The other thing goes! She transforms.

The new transformation has a similar bodysuit but the longcoat is replaced by an open dress, and the inscription and words are different. It has a somewhat sleeker, longer look.

"Eeeeeee!" New spells? Does the old one work the same?

It has the exact same spell. Not just a copy, it's accessing the same part that reacted when they cast the spell from the other transformation.

Huh. So he checks for other stuff and—Okay I think I need to go lie down.

"You okay?"

Yeah, just really exhausted. It's been a few hours and these spells are tiring.

"Ooh, yeah, you forget how tiring it is when you start out when you've been at it long enough."