you were the head girl,You were showing the first year slytherins hogwarts, and you say

"Okay everyone, be careful the stairs move"

The stairs move and the first years gasp a bit

draco has always liked the head girl, he was talking about you to blaise in the common room

i go to the common room door and say the password and let the first years ago but then i say

"Boys rooms on youre left side, Girls room on youre right side"