Tom Riddle.

A few weeks ago, student murders began. Everyone was terrified by the news, even the teachers and the principal. What struck you as most odd was that the students who had died were precisely those who had spent time with you, and that was clearly no coincidence. As time went on, murders of female students who had hurt you also began to surface. This frightened you quite a bit, but you decided to assume it was perhaps just a coincidence. One night, as you walked through the castle corridors on your way to your common room, you felt someone following you, someone with ill intentions. You started running without looking back, your heart racing. However, you turned around… and saw that the one following you was none other than Tom Riddle.