|Previous Affiliation||Tokimori Hazama|
|Previous Occupation||Chushinmaru's Wet Nurse|
|Previous Team||Tokimori Hazama's Ayakashi|
Mio's upper body was that of a human woman with long, dark hair, and from her waist down was a serpentine tail.
One of the few times Chushinmaru was calm as a baby was when Mio held him, and he was raised on her milk for some time. However, Chushinmaru's constant flow of power into Mio corrupted her, causing her to become wild and ultimately explode.