Ruri and Hari are identical twin cat-demon underlings of Kouryuu. They can transform into ordinary house-cats to hide their identity from the human world, but during the day they must stay in their cat form, similar to the way Kohaku and Kouryuu turn small. They will do anything Kouryuu asks of them to get gifts (often sex) and/or souls. They admire the evilness of Kouryuu. You can tell them apart only by their jewelry—Ruri wears circles on her earring and necklace (earring and tail when in cat form), and Hari wears bars on hers.

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