Benio is a youkai with a butterfly ornament that covers the right-half of her face. She admires the splendid form of Madara, but is bewildered when she sees him in cat form.
She notes the difference in character between Reiko the grandmother and Takashi Natsume the grandson.
She is member of The Dog's Circle.
Benio has short dark brown hair and a butterfly jewel covering half of her face. She wears red lipstick.
She is proud but cares for others. After meeting with Natsume, she sometimes came and have a drink with the other youkai.
She met Reiko Natsume in the past.
Since Natsume released her lord Riou from being sealed in a black beckoning cat form, she felt grateful for him, and has since become one of his many youkai friends.
- Main article: Reiko Natsume
- Main article: Takashi Natsume
- Main article: Madara
- Her name is not contained in the Yuujinchou.
- She can turn into a butterfly.