Translation - the school carriers usually have a theme, which means they're the Disneyland version of a country stereotype, and the girls attending adopt some of the stereotypical mannerisms and language of the country or culture they're patterned after. So the history club dressing up at Oorai is what all the girls at Saunders, Anzio, Pravda, and the others do.
Great job finding it, although I believe it should be Alina, and not Alena. The original Japanese is Ariina, with a long e sound, the same as Alina, which also happens to be of Russian origins, which fits in with the Pravda theme.
Either way, thanks for finding that info. I'll update the tags with her info.
Considering Klara's trouble with Japanese/Only ever speaking Russian outside of one line in the film, I have trouble buying that.
That comment was written before Klara appears.
So how long did you bel-ieve in Santa?Don't be silly!My Own SantaHmm...
I don't really remem-ber...?C-Com-mander Katyusha!
Of course Santa exists, right!?Ha ha haShe was a tall woman with black hair!I don't just believe that Santa exists!I've seen Santa with my own eyes!