Shion Kuresato

The butler of Kuzuha Kirika. Although she sometimes appears in her blue-haired older form, she is actually a twelve-year-old junior high student. It is revealed at the end of season 3 that she was granted the ability to turn into her older (male) form by Jormundgandr, a giant snake that she and "Kuzuha-sama" found in the Amazon, who has been controlling the two of them in its quest to find the ultimate butler.

She is very devoted to her mistress, and takes it upon herself to supply the superintendent with the sweets she needs to keep up her energy.