[ South's eye-roll at Kokichi is off-camera. ]

Yeah, and the uniform's size is fuckin' important, too. If the thing's taken it to wear then whoever it's mimicking can't be someone who needs large and up. Might rule out some people.

[ South does a final sweep of the closet before figuring she's found all there is to find, then heads back out into the rest of the room. After a brief pause to blink at the mess Setsuna's made now that she's seeing it in person, she heads to check the perimeter of the room and the other doors. ]

Uh, yeah, so, looks like the other locks in here are all fucked up too.