Dr. Kimaira is a master craftsman who mostly resides in Amagai Castle, which is laden with traps and gadgets. Kimaira captured Ayame in Wrath of Heaven and kidnapped Princess Kiku. His role as one of Tenrai's disciples is that he wants to help by making an army of automated wooden robots. He also has a mechanical doll strapped on his back, in which he calls "Mahime". In Rikimaru's story, he is blown apart along with his Mahime doll. In Ayame's story, he is slashed to death and in his dying breath prepares to unleash toxic gas into Amagai Castle.