A gift from Shiki Taishou — a replica that possesses sentience. With the departure of Kamuna Harunosuke, the replicas scattered throughout the Mystic Onmyou Chamber would deteriorate over time, becoming nothing but fragments of memories and Charm Magic. However, it is precisely because this is so that "Shiki Koshou" is most rare and valuable indeed. It may well be the last remaining replica that can maintain constant remote contact with Shiki Taishou as a mark of the latter's deep attachment to his friends.