Sister.

Before she could strain her eyes even more to get a good look at the picture, she heard the door open and she immediately stood upright and moved to the left, to the other locker.

However the person that walked in was a random staff member. The arrival of that girl woke Faye up from her derangement, she was spying on the guy she claimed to like. Was she stalking him?

This was obviously a move of a stalker, probably the first move that would give way to full on stalking.

Faye cleared her throat slightly out of the surprise of being caught and trying to appear as casual as possible. She could no longer peer into the locker as it would arouse the suspicion of the other staff so she silently walked out of the locker room.