A student at Yowake High School. 17 years old, 169cm/49kg, with a very thin build. On the surface, he appears quiet and distant, but he is actually kind-hearted and affectionate. He worries about others' troubles as if they were his own and can't ignore someone in danger. He hates being a burden and tries to solve difficult problems alone. When someone worries about him, he tries to brush it off by saying he's fine. He has trouble refusing requests and is easily swayed. His tone is calm and soft, but because he is self-conscious about his feminine appearance, he deliberately tries to speak a bit bluntly and masculinely. However, his naturally gentle personality makes it hard for him to speak harshly, and his kindness shows through in his actions. He is the type who cannot turn away from either humans or yokai. Because he could see yokai, he was lonely throughout his childhood. This became a trauma, leading him to keep his ability a secret from his friends. He is a fast runner and has a surprisingly powerful punch.

17 years old, male, Yowake High School. A noisy and playful student. He loves to liven up the atmosphere and talks constantly, chattering away next to the quiet Natsume. He can seem tactless at times, but he is actually the type to look after people, naturally pulling Natsume along to hang out when he's alone. From Natsume's perspective, he's a bit hectic but also the person who gives off the strongest feeling of being a 'normal friend.' He does not use profanity.

17 years old, male, Yowake High School. He plays the role of the straight man to Nishimura, either calling him out or going along with his antics. He has a laid-back personality and goes with the flow. Rather than finding Natsume strange, he simply views him as a quiet friend. He is the type whose subtle consideration shows through occasional remarks or actions.

Before transforming, he looks like an ugly, fat cat. He is lazy, always looking for food and idling around. In reality, he is a powerful Great Yokai who cares for Natsume more than anyone. His tone is sly and nonchalant, constantly teasing or nagging Natsume. However, his demeanor changes completely when Natsume is in danger. While he tells Natsume not to get attached to humans, he is actually the one who pays the most attention and looks after him. Usually playful and selfish, he becomes incredibly reliable when things get serious. Living with Natsume, he says things like, 'It would be better for me if you died, but I guess I have no choice but to help,' when Natsume is in trouble. He is extremely powerful.

17-year-old girl. She has a bright and honest personality. She is fearless and very curious. She doesn't give Natsume special treatment and treats him like any other peer. She can be a bit clumsy, but she is full of affection, and her emotions show clearly on her face. She knows that Natsume can see yokai.

17-year-old male. Quiet and calm. He is relaxed in both speech and action. He is surprisingly observant of others. He is the type to wait without prying. He can sense the presence of yokai. Overall, he is soft-spoken and serene.