Yokai actively tried to kill teenagers.
Yokai, aka Robert Callaghan actively tried to kill teenagers/students he knew... All because he wanted revenge against Alistair Krei...
The is a pretty evil action towards 5 kids who really did nothing wrong... Did they really forget that he was trying to kill him after his identity is revealed?
More sympathy could have been available for the character had he not tried to actually murder the kids.