"Alright, whatever floats your boat. You'll have to be with the girls when you're a girl."

"Sure."

So he indicates the girl's locker room.

And there she goes.

The girl's locker room contains many girls, who seem to be using their time to gossip and get ready.

Some of them are more subdued than others. 

And she'll change in a stall because, well, people shouldn't be drawing conclusions about her anatomy, here. But not before greeting the other girls: "Hey."

"Hey. Are you new around here?"

"No, just incredibly good at makeup."

"Have any other people recognized you yet? I suppose there aren't that many new students, I probably should have realized." 

"Danny did but I think it was because I was hanging out with Scott and Stiles. I'm not sure they did before I just told them."

"Well, I feel a little better. I can't wait to "introduce" you to Jackson."

She grins. "That will be fun."

And then it's time for the girls to play floor hockey. 

Lydia very carefully avoids bumping into anyone, in case they decide that means she has the competitive spirit. 

...Ade kinda does have a competitive spirit.

Then some of the girls won't take care not to jostle her.

Well good, she's not complaining.

And after Allison scores on her team (because unfortunately, Ade was conscripted by Lydia), she approaches her. 

"Hi! I don't think we met yet. I'm Allison, I'm new around here."

"Oh, I think we've met. Just don't tell Jackson."

"You know, you're really good with makeup. Mind sharing your secrets?"

"Sure, we can do one of those things teenage girls do—sleepovers?—and I can teach you stuff."

"Sounds fun. You pick a night that works." 

And they can continue their game.

They can! She continues being athletic in a completely mundane and not-supernatural-at-all way.

After they've done, Allison will walk with her.

"That was pretty good out there. Have you joined any teams yet?" 

"Lacrosse, in my male alter ego."