It's the school nurse

"Tum told me there'd been an accident..." Kirsty said as she entered the room, her voice trailing off as she saw Miss Ogawa standing in the middle of the room completely naked.

"Shut that door!" Miss Ogawa suddenly cried, "we have no idea if this is contained!"

"Contained?" Kirsty asked, her eyes widening. "What's going on?"

Miss Ogawa slowly stalked towards the red headed nurse, who didn't seem to know where to look with her naked peer walking towards her. "I don't know yet, but I think we need to call for help."

It was at that point that Kirsty spotted the two naked students at the back of the room as well, and her mind raced with possibilities, none of them good. "Maybe I should go get some help..." She begun, backing towards the door.