|Japanese name:||百野 栞|
She is a classmate of Yuka and Kakeru.
Her secret identity is that of an apostle of Index, the largest magical organization within the world of 11eyes and 3days. Her real name given by Index is "Ursula of the Bookshelf". She transferred to Kakeru's school to monitor the place and report its situation to Index. Her assignment was due to the sudden disappearance of the last warden. She is extremely powerful and is candidate for the next 14 saints, the highest officials within Index. However, her family line is cursed to be born without eyeballs. In her case, the curse is even worse and she couldn't even move a finger. Her current body is a magical artifact with her brain and nervous system transplant into and allow her to hold 5000 magical books within. The body operates by absorbing magical energy.
In the endShe gave her fragment to Kakeru to send Liselotte to the space-time rift.
Voiced by: Emiko Hagiwara