Kanna's mirror

has the ability to control others by stealing their soul. However it cannot steal the souls of people with powerful objects, such as Kaguya. Also the mirror can be overwhelmed with such a soul as Kagome's soul or Kikyō's incarnated soul. It can show whatever the Saimyōshō are seeing or show Kanna what is being reflected on a mirror-like surface. It can also reflect almost any attack back at the sender; it can repel the Kaze no Kizu, but not a Sacred arrow as they are powered by soul and thus would be swallowed into the mirror.

The mirror can also summon a glass demon. The demon can copy the abilities of the one it reflects. When Kanna has summons the glass demon she can create a shadow of her mirror to shoot rays of light to her challenger; if something is sent into the mirror's shadow, the mirror itself may break, as Kagome believes. However, any damage the glass demon would receive goes to Kanna herself, making it a walking Voodoo doll.

Spiegel 神无之镜