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.
Kanimir and Jaromira in Fabulous
It is a really good thing Katarzyna knows these exhibits so well. It means she can talk about them intelligently while most of her attention is focused on how excellent Isabella is.
--She ducks her head and giggles. "I think I haven't been called that since I was young enough to automatically qualify."
fabulous_ones
"Well, maybe you are not usually in circumstances that cause you to show off your cute."