[ The first thing he'd notice is the sign on the wall warning people not to run, and Kido makes doubly sure of that with her arm hooked with Yamato's. It's the ped's floor of a hospital, which definitely doesn't match up with the hospital proper if Yamato had been in it during the day; there's no reception desk or lobby or emergency room or anything, just the floor and rows of doors along the dark hallway. ]

I've been through most of this place already. There are only three doors that can open on this floor.

[ She points them out as they walk by, because the last one at the very end is the one they want. ]

Apart from the second door, there shouldn't be any monsters on this floor. [ This, she is wrong about. ] The door we want is this last one here.