He is the deuteragonist of the series. Reigen is a tall man with dark brown eyes and short, reddish-blond hair [3] with messy bangs. He is also very vibrant with his facial expressions ranging anywhere from attractive to terrifying, and he tends to sweat profusely. He is usually shown wearing a dark grey business suit with a pink or black tie, though he has also worn such outfits as a sweatsuit, a tank top with shorts, and a complete high school girls' uniform.
Still, that revealed that he also has relatively hairy legs. Reigen has few to no qualms about manipulating clients, enemies, allies, and even spirits to his own advantage. Later in the series, he feels guilty about manipulating Mob in particular. The gift of the gab or conversation is his specialty. Throughout the series, he has been shown to remain composed in almost any situation, and he is extremely reluctant to admit to his own mistakes.
He is very careful during his investigations, and he often confuses his adversaries by announcing his next action aloud and then doing something different. Reigen seems to be a man guided by principles and is very socially and emotionally intelligent. He believes hurting others is wrong and reminds Mob of that often, demonstrating his honorable and noble side covered by his shady business.
When he entered the Claw headquarters, the subordinates found him to be a very kind and honorable man, and even after they realized he wasn't "The Boss", they still commented on his wise and caring nature. He is even willing to carry some of Mob's burden if it means the boy will suffer less, showing that he does care about those close to him, and even tells Mob he didn't have to stoop to their level and fight because he knows Mob would be hurting, showing he doesn't want Mob to feel pain.
He is clever and agile, often taking action with his special techniques at critical moments. He is also a very intelligent man, capable of analyzing a person's psychology fairly well and giving advice to several people, which makes them better individuals, such as the members of Claw.
