Keikounitten, Ruuan

慶幸日天汝昴

Liberated by Tasuke from a wand artifact, the kokutentou was discovered in the same region as the shitenrin and dispatched to Tasuke by his father. Unlike Shaorin, Ruuan's duty is not to shield Tasuke but rather to ensure his happiness, a goal she pursues by animating inanimate objects to carry out her commands. In the manga, she secures employment as Tasuke's homeroom teacher. Ruuan and Shao are sworn adversaries, and clashes frequently arise because their respective mandates to keep Tasuke "safe" or "happy" do not always align.