She is sitting in the library, studying. It's her most common pastime, by hours; spending time with her sister is more enjoyable but Jaromira prefers to socialize more broadly and Katarzyna would only get in the way. This is better on net; the two of them share a room, so it isn't as though her sister's time is entirely hogged by the other girls who call this boarding school "home." Or at least "prison." Katarzyna doesn't mind it, though; the school library is excellent, and basic manners and care for the books has endeared her to the librarian to a sufficient degree to lubricate the interlibrary loans process when there's something she wants to read that they don't have.
They're part of her body now and she likes to be familiar with how her body works.
She lands at the air park. Anyone she recognizes?
Okay.
She approaches someone who isn't flying right this second and says, "Hi, I'm a magic nerd, what's your power?"
She can't do this.
Not after last time, not when every interaction could turn out like that one.
Is the park vaguely accessible to non-fliers?
Okay.
Katarzyna retreats to a small less-visible corner and texts her sister:
Consultation's over, went fabulously.
At air park now.
Tried talking to one girl, went badly
I can't do any more.
I need you here.
Can you sneak out by yourself or should I come
I can sneak out, it'll take a bit but not as much time as it'd take you to get there and back.
I love you.
And after some sneakery, a bus ride and some walking, Jaromira walks in. She's dressed nicely enough not to get too many odd looks at a magical girl venue. She spots her sister, makes a beeline for her, and hugs her for a while before peeling off to go talk to people and solicit permission to mess with copies of their powers.