Back before Shana became a Flame Haze, she was living in a large castle-like structure floating in the sky, the Heavenly Palace (Tendo-kyu), along with Alastor, the skeleton Shiro, who trains with Shana, and a maid and Flame Haze, Wilhelmina Carmel. One day, a Denizen attacks Wilhelmina, and Shiro goes completely berserk after Shana, in an attempt to finally best him, pranks him by dropping him in a large pit of ketchup, which reminds him of blood. In his panicked craze, he uses his power to destroy a barrier of invisibility, revealing the Palace to a bike-riding Denizen as a most fearsome Mystes, Tenma Kuiko, arrives on the scene looking for a battle.