Translated as "Scales Threat," Rin-Koh (神魔・鱗劫?) is a fish Shinma that appeared in the form of a mermaid in an aquarium. It shared its dream with Toshiro. When Toshiro tries to rescue it and return it to the ocean, she ate him. Larva shattered the tank upon Miyu's arrival. Rin-Koh sheded its disguise and was quickly defeated by Larva. Thus, Miyu returned Rin-Koh to "The Darkness."

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