It haven't been long since Ghost saw Harry for the first time. If she was to guess, she'll say he is a new teacher which is right but that wasn't enough to pique her interest, something about Harry was different.
He was extremely handsome when she saw him for the first time. Her heart fluttered at the sight of such majestic figure that she even planned to make a move on him.
That faithful day was Sunday, literally yesterday so she was free and decided to stalk him a little bit. Couldn't let a cutie slip by.
As she watched, she noticed something was off. She couldn't quite tell but something was definitely up.
After about an hour, she decided to make a move. What she planned was something involving her beast. She have the magic of necromancy so she, unlike the other mages with summoning and controlling magic, commanded the perfect beast to him.