Nemuri Suiki

Demon. An executive of "Kibushu" or "Oni Warrior Horde", one of the five major crime syndicates in Tokyo Kingdom. Slightly enjoys napping more than the snacks she eats three times a day, and is asleep during the day for much longer than she is awake. Made a water yokai "Mizuchi" into her familiar, and often uses it as her pillow while she dozes off.

Although she has the ability to bend water at will, she is less powerful when she is awake. When asleep, Mizuchi automatically attacks enemies, and with the "Suiseiken," a flowing water blade that grows stronger the more she sleeps, she cuts down her foes.