Powerful youkai Hinoe typically manifests as a human woman. She possesses extensive knowledge of the supernatural world and frequently guides Takashi Natsume, acting as his mentor. Her interactions with Natsume blend playful teasing with instruction, reflecting their dynamic. Hinoe harbors deep affection for Reiko Natsume, Takashi's grandmother, signifying a longstanding connection to the Natsume family. Her relationship with Madara, also known as Nyanko-sensei, involves similar teasing, suggesting familiarity and a complex shared history. Hinoe leverages her expertise to assist Natsume in navigating challenges involving spirits and the Book of Friends.