Yako first appears as a beautiful woman with long beige hair worn tied with a red and white ribbon with small bells, reminiscent of fox ears.
Her real form is a small white fox. In the past, she was an inari statue in front of a temple gate, presumably near Misaki's schoolhouse.

Yako has command over the Misaki Stairs - her boundary. It can be accessed by stepping on the 4th step of the stairs.