Kuma, a bear yōkai, aids three oni girls in their mission to enhance human-oni relations. Physically small and cute, Kuma has round ears, big black eyes, rosy cheeks, and a bob-cut hairstyle, adorned with large gold earrings. A green bandana occasionally accents the forehead.

Shy and reserved by nature, Kuma consistently displays kindness and prioritizes helping friends. As a cook at a yōkai-run pancake house, culinary skills earn respect, with pride shown through recipe refinements and role dedication.

Kuma harbors a distinct fondness for alcohol, particularly sake. Arriving in the human world, Kuma carried a bottle nearly as large as their small frame and frequents local bars where staff recognize them, indicating habitual patronage.

Functionally, Kuma provides the oni girls with transformative "onipan" (oni underwear) as a solution to challenges, clarifying it alters only their costumes without granting true superpowers—initially frustrating the recipients. Kuma also contributes to revitalizing locations like a struggling shopping center, supporting the broader goal of fostering human-yōkai relations through community engagement.