Okay i tell you...
...how to defeat them.
Acculard:Shoot at him when the '?' is onscreen. Stopping him from hitting: Shoot at the dead students when Acculard throws them. Location: The room next to the classroom.
Hanzou: Shoot at the red line. Stopping him from hitting: I should warn you, nothing can stop him from hitting. Location: Toilets.
Casandra: ??? Stopping him from hitting: ??? Location: ???