Age: 15 Birthday: September 17 Height: 171cm Blood Type: O Another student who had recently moved into the area. He is sickly and quite susceptible to illnesses. Like Natsume Takashi, he is able to detect spirits, but to a lesser degree limited to seeing merely shadows and sensing slight presence of spirits. He wants to help Natsume in anyway he can, but is afraid that he will just be a burden because of his weak ability.
Age: 15 Birthday: May 15 Height: 160 cm Blood Type: O Tohru Taki is a female student at Natsume's school. She was first "discovered" by one of Natsume's friends, Nishimura who had heard rumors of her beauty and became entranced, he still maintains an obvious crush on her even though Natsume holds most of her attention. Taki is introduced into the story as a shy, silent girl. Later, the reason for this is because she was cursed by a yokai; the last 13 names said by her will be eaten by him at the end of a one year period. The yokai also throws her into an impossible gamble for her life which he does not honor even when she wins. Taki is generally a happy, extroverted and optimistic girl. She is shown to have a peculiar taste in cuteness, as is shown when she hugs Nyanko-sensei, calling him cute. Like Tanuma, she tries to help Natsume in any way she can, but is usually prevented from doing so because Natsume worries about their involvement with yokai. Even though Taki herself has too little spirit energy to see yokai, she does have the knowledge of drawing yokai circles, discovered by her grandfather. The circle, once drawn, gives any human the ability to see yokai who step within the radius of the circle. The circle does not require any spirit energy to create and activate, so anyone could possible draw it if they know how to. But due to it being complicated in looks, Taki is presummably the only one able to draw it without the need of a guide.
A mysterious feline spirit. Madara was sealed in a shrine until he was accidentally released by Natsume. Because Madara was trapped in a material form for so long, Madara ordinary takes on the shape of a maneki neko (lucky cat), leading Natsume to nickname him Nyanko-sensei. In this form, other people can see him, leading for Natsume having to ask his guardians if he could keep him as a pet. Madara is a powerful spirit, who protects Natsume from others and teaches him spells on occasion, in return for Natsume's promise to give him the Book of Friends when he dies. They often fight each other, which leads to Natsume punching Madara on the face and knocking him out. Despite his protests of not being a cat, he likes to play with cat toys. Nyanko's design is based on a lucky cat statue Midorikawa was given as a child. In the anime, Natsume is more respectful to Madara.
A "young" spirit who befriends Natsume in the seventh episode of the first season, after being rescued from other yokai, who bullies him due to his gentle and shy nature. Because of this, he takes a great liking to Natsume, who also rejects to have his name for the Book of Friends and instead tells him they are friends. Occasionally he heads off to visit him and due to his inexperience as a spirit needs a potion to turn into a human child for a while. It is implied that his mother has passed as when Kogitsune talks to what is supposedly a grave he refers to it as mom.
Sasafune is a mermaid that appeared in episode 8 when Takashi went to an inn with his male friends to study. She knew Chizu Sakanaka, the owner of the inn, when Chizu was small. She thought that Chizu had used her to get her mermaid blood, which is said to give immortality to the one who drinks it.