Natsume is a young man with average height and build. He has golden eyes and red hair which is asymmetrically cut, growing a streak on the left side that goes down to his shoulder, while keeping the rest of his hair at average length. Some of his hair is coloured white, but most of it is red.

Personality

While he may come off as mysterious and aloof, Natsume's actions say otherwise. He's a good conversationalist, and hard-working. His ability to talk allows him to get along well with most people should he wish it, ensuring him capable of building connections. In order to protect his image, Natsume presents himself as cool and uninterested, coming and going as he pleases -- however, he has a tendency to butt into situations should it concern the people he cares about (such as Shu or Sora). He will also push himself to the brink, even if it may be at detriment to his own health, if he believes the result will be of use or protect the people he cares about. However, his monomania can cause him to disregard the outside world, including the people he intends to help, so he can become out of touch and forget about the emotional state of others. Often, he later expresses extreme remorse through constant apologies and sometimes to the point of physical self-punishment. At times, he loathes to show his emotions in an honest way, and instead of being straightforward he will instead attempt to obfuscate, or mask it with violence. Despite this, either with the help of people like Sora or Tsumugi or through his own will and/or actions, these feelings often make themselves known in the end, even if he entirely refuses to acknowledge them afterwards. Even if his words are harsh, Natsume is a genuinely kind person. He often offers help to people in need of it, even if they have wronged him in some way or he isn't familiar with them. He tends to worry over people in privacy, and attempts to help and boost people's spirits even if from a distance. He is very aware of his surroundings, so even if he doesn't show it outwardly, he will many times take notice if someone is struggling. Though he turns out to be generally friendly once you interact with him, Natsume dislikes letting himself be truly understood. He will dodge his feelings, and decline requests from peers to participate in any activities, even if his true desires say otherwise. He shuts himself away in secret rooms in order to isolate himself, and when invaded he expresses visceral discomfort. However, over the course of his second year he has come to gradually open up, and slowly allows people into his spaces. Most of the time, Natsume will attempt to resolve things from a distance and act cool in the face of hardship, in order to hide the fact that he may be affected. Nevertheless, he possesses a reckless streak and can lash out at others and take impulsive risks due to this. He dislikes not having the upper-hand in situations, such as Tsumugi and Anzu being immune to his magic, and so he becomes taken aback or frustrated. Just as how he dances around his positive emotions, when he believes his feelings to be a burden to his loved ones, he will keep it to himself and ignore any attempts made by others to truly understand him. In spite of this, when pushed and provoked enough, his true feelings will shine through. Eventually, however, Natsume is able to work through them with the help of others, and he will reflect on them with a sense of regret. Over the course of his second year, Natsume has improved himself considerably and can deal with his emotions in a healthier manner. However, a part of him prioritizes his image and desire to look good, so for the most part he still attempts to act cool and composed. Regardless, he has and is still in the process of opening up, and genuinely wants the best for others.

Trivia

• His sentences always end with katakana; he explained the reason being as a type of "good luck charm" that yields a sense of discomfort through distorting his pronunciation at the end of his sentences. Scars are created on the heart through having sounds caught by the ears.
• Tsumugi mentions that Natsume used to crossdress as a child. In a tweet, Akira revealed this was the result of an old Japanese tradition to protect young boys with weak constitutions. Natsume seems to find the topic unpleasant whenever Tsumugi brings it up.
• He skips class a lot. The reason for this is that he's a quick learner and is able to study the materials of a year ahead of his classmates, but he also insists on wanting to spend his time freely without feeling restricted.
• He appears to wear perfume at school, as Makoto and Sora remark he gives off different fragrances depending on the day.
• He can bake.
• He can't swim. He fears he will be looked down upon if any of those around him know, so he makes an effort to avoid any situations that may involve swimming, including skipping P.E. class.
• He has created many secrets passage around the entire campus, and has also been placing hidden cameras in places such as the secret room.
• He loves all games, but he absolutely hates losing.
• He believes education is a form of brainwashing.