Asato Tsuzuki is a shinigami with 70 years' worth of experience. He has the power to call upon twelve shikigami, mythical creatures that aid him in battle. The shikigami reflect actual historic religious beliefs--such as Suzaku and Byakko. The manga portrays Tsuzuki's relationship with the shikigami in much more detail. Tsuzuki is the senior partner of the Second Division, which watches over the region of Kyoshi.