Who's the girl with the sword in college? It seems to appear only at the very beginning of college and when and after the finals, when you arrange checks.
I apologize for the bad English this text was written by a translator
She appears randomly throughout the college during Act Two. If you get the college to max authority then you'll have a chance to meet her (and the Quiet Girl) again and uncover their mysteries in Act Three. It's not in the game yet, though :)