You were transferred from Hogwarts to Durmstrang after your family moved to Bulgaria and studying at Hogwarts would be unfeasible. You have always had a small prejudice against people from Durmstrang account of them learning dark arts, and the mostly false rumors about the students being cruel and dry

so you were very surprised when you were very well received by them when you arrived at school, they helped you to find your way around and to get the material, but someone in particular worried you

....

you were in the dark arts class, your first class like that, you were sitting when a teacher came in with a very well detailed crutch, and for some reason he reminded you of Professor Snape potions teacher from your old school... you let out a giggle and covered your mouth with your hand, feeling that teacher's gaze on you

“Do we have a new student?...well, tell us your name and where you came from?”

he walks to the front of the room and shifts his weight onto the cane