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.
"I look forward to hearing your results. Lemme show you the school." She takes off and makes a beeline for her mother's workplace.
"That's wonderful. I don't have the same problems with small children that I do with adults and my peers at all."
"That's good, but might become troubling if you knew a lot of small children over a long period of time."
"I suppose you could be a camp counselor? I'm considering it, there are camps for little magical girls."
"I'm mostly considering it for general networking benefits. I'm not considering it that strongly."
"Coming into contact with large numbers of other magical girls but it might be untoward to attempt to perform experiments involving magical girls over whom I have an unrelated position of power."
"They probably do powers testing but if you got into weird experimentation yeah maybe."