Kagerou Daze/Snakes

Black snakes with deep red eyes grow from Azami's head as her hair, which is a typical feature of a Medusa, but 10 with abilities were her most significant. These snakes are created from Azami's strong feelings and are manifestations of her instinctive wishes, most commonly out of fear. Each snake has a set of supernatural abilities that it grants to its owner to help fulfill a specific wish; acting towards this wish is the reason for each snake's existence. In the real world, most of her snakes are not sentient with the exception of the Snake of Clearing Eyes, which is the snake that gave Azami the idea of creating the Kagerou Daze, and Konoha. In the Kagerou Daze itself, the snakes have been shown to be able to talk to their future owners.

A snake can act as a surrogate for a person's life. After Shion and Marry were murdered by humans, Azami ordered the Kagerou Daze to swallow them, as time does not pass there. Azami then gave Marry the Snake of Combining Eyes, also known as the Queen Snake, so she would be able to return alive to the real world. However, this caused Azami to lose control of the Kagerou Daze, and it continued her order to swallow up people who die on the day Shion and Marry did, August 15. To follow the Queen Snake that is now in real world, the snakes began to leave the Kagerou Daze through the bodies of humans who entered it with a strong wish that can be fulfilled with their abilities.

A snake can "disappear" if its owner's wish can no longer be fulfilled by its abilities, be it because the wish has been completely fulfilled or by other circumstances, and if its owner has no other strong wishes that it can fulfill.