[Setsuna has time, on her way to follow Kokichi's directions towards the lounge, to send a quick, but polite response.]

Those of us already outside the dorms can verify the dorm areas were breached sometime around two hours before the alarm went off. Whoever they're pretending to be would've likely been replaced during that window of time.

... I'm sorry. From the way it sounds like this creature works, it may not be possible to narrow down their location any more beyond that. Please be safe, sir.