Or, just "Ammy" for short, is played by Polly. Amaterasu is a happy and ancient Japanese ghost who has, over the years, mastered most of the perks that come with being dead. She loves animals, smiling faces and being admired. You're more likely to see her wandering around the castle in her wolf form, as she's grown more accustomed to it though the years. In this form, she talks in writing (made clear through the use of bold in her tags,) even in person, she can still write her thoughts in magic ink that appear and disappear as needed. Why does she do this? probably because she still gets a kick out of people freaking out at her human form.