Yamada-Sensei Petrified

As the perpetrator cut through the pool area, they noticed that Yamada Maya, one of the Academy's assistant instructors, was there.  They couldn't afford to be seen by anyone, and she would also make a nice, busty statue, so they gave her a quick zap from behind with the conversion ray, leaving Yamada-sensei utterly unaware of their presence.

"That's five now..."