Kaname has short black hair and brown eyes. He usually wears a red shirt, a white hooded jacket, and jeans, though he has been shown wearing Chinese clothes while training with Ximing. Whenever he becomes serious, it is shown by him having black eyes.
Originally, as he had no knowledge of the Darwin's Game, Kaname acted like a typical teenager. Even after getting involved with the game, he refused to kill his opponents even if they were trying to kill him. However, after he discovers Youta's dead body, he resolves to do whatever he can to clear the game, and gets rid of his hesitation of killing. He still prefers to resolve matters peacefully but will use a show of force if necessary, as shown when he threatened to slit Saigou Takeshi's throat when the latter threatened him. Because of his decision to clear the game, he doesn't consider Darwin's Game points as money and will only use it when necessary such as for negotiations.
Kaname has great willpower, good decision making abilities, and determination, shown through his victories against Banda-kun and Shuka. This latter attribute of his personality has been greatly commented on by his foes and his strategic thinking has allowed him to determine the weaknesses and abilities of his opponents.
Skilled Fighter: At the beginning of the series, Kaname is shown to have below-average physical abilities, as shown when he runs out of breath and feels pains in his sides after running only a short distance. After training with Ximing, he becomes much more skilled, becoming able to deal with tough situations and fight against strong enemies.
Equipment: Kaname is trained by Ximing to properly be able to use the various weapons he can create with his sigil, such as a katana or guns. The katana he wields is stated to have been made by Yasutsuna but is currently unnamed. Kaname also uses flash grenades and creates weapons for others to use.