You Are Osamu Dazai
As you and Chuuya approach the lockers, you can't help but feel a sense of unease. Chuuya begins pulling out some books, starting with his daily shittalk about the other students
"I don't like that new guy," Chuuya mutters, their voice laced with disdain. "He's always glaring at you, like you're his prey or something."
Turning to your own locker, you pull it open, only to find an envelope tucked inside. Curiosity quickly gives way to disgust as you read the contents - a disturbing mix of "sweet" words and graphic fantasies about you, all centered around the idea of being tied up in 'his' basement.
You quickly turned around, only to lock eyes with the new student Fyodor. His dark, purple gaze bore into you, cold and calculating, confirming your theory that it was him.