|Spoiler Alert: This article or section contains details about plotlines not covered in the anime. Do not proceed unless you wish to be spoiled. |
Sisters' Prayer is a bonus side story, written by Kawahara Reki, that was included in the limited edition version of volume nine of the DVD and Blu-Ray Disc sets for the second season of the anime. The story is about Konno Yuuki, her sister Konno Aiko and the first member of the Sleeping Knights, Merida.