Kawauso, a yōkai from Japanese folklore, emerges as a river otter with shapeshifting abilities to assume human form. His depictions vary across adaptations: sometimes clad in modern t-shirts and shorts, other times in traditional yukata and conical hats, though his brown fur, whiskers, and tail remain constant.

A cunning trickster, he lurks in Obebe Swamp, masquerading as a vulnerable child to deceive others into procuring resources for his benefit. Early tales chronicle his alliances with Nezumi-Otoko, where ill-fated schemes spark clashes with Kitarō. Despite his mischievous streak, Kawauso aids Kitarō in underwater quests and battles against fire-based foes, wielding expert swimming skills and pressurized water jets from his mouth.

Later arcs unveil deeper complexity. A chance encounter with an elderly man, who mistakes him for a grandson, drives Kawauso to abandon deceit for a tranquil life, revealing latent empathy. Subsequent portrayals cast him as a jovial resident of Yōkai Yokochō, trading pranks with Amabie while retaining his carefree mischief. He rises in prominence during larger conflicts, championing Ishikawa as one of Japan’s 47 Yōkai Warriors and piloting the Clam Boat to track supernatural threats.

Temporary power surges occur when he dons Kitarō’s Yōkai Cloth, gaining hair and whisker-based attacks and heightened water manipulation. These abilities fade post-mission, restoring his innate talents.

Folklore origins paint Kawauso as a long-lived, perilous shapeshifter. Legends warn of female variants luring victims to watery graves or weaving illusions to escape hunters, cementing the yōkai’s ties to danger and guile.

His media evolution reflects tonal versatility—morphing from grotesque prankster to comic ally—while anchoring his identity in water mastery and moral fluidity. In *GeGeGe no Kitarō: Nippon Bakuretsu!!*, he upholds his role as a secondary yōkai, contributing within his established narrative scope.