Dr. Noh's assistant. He has extensive medical knowledge and is a neat freak with a germaphobia streak. He holds his foster parent, Kagura, in high respect. He is a former experimental subject of a mysterious organization called PNA; though traumatized, he receives care from Kagura.

Kei's foster parent. A descendant of the Great Yokai Princess Sakura, possessing the power of imagination. Though shrouded in mystery, they are caring and well-liked by Geo and the others. Age unknown. Their creed is "Age doesn't matter when a parent wants to protect their child." They love and dote on Kei as if he were their own son.

A survival expert. He never loses hope in a pinch and is incredibly positive. Possessing superior physical and mental strength, he proves his worth every time he faces a crisis. He is kind-hearted and will rush to help his friends immediately if anything happens.

A powerful, gluttonous girl from the jungle. She doesn't mind going days without a bath. She is skilled at sensing danger through wild instinct.