Denji is both brash and naïve as a result of being unable to have a formal education and socialize due to living in severe poverty. His personality comes off as rude and harsh in an almost childish way. However, he has a good sense of empathy towards other people, willing to save those in danger as much as he could, showing he is a kind-hearted person despite his shortcomings.

Denji is a teenage boy with blond and scruffy hair

His true devil form is of a large, humanoid devil with four arms and a chainsaw protruding from each, with another chainsaw coming from the front of his head, similar to Denji's hybrid form. An intestine still connected to his stomach is wrapped around his neck, resembling a scarf or a collar.

Horrid, erratic behavior, hostility to enemy debol

Pochita exhibits a more erratic personality when in his true devil form

His true devil form is of a large, humanoid devil with four arms and a chainsaw protruding from each, with another chainsaw coming from the front of his head, similar to Denji's hybrid form. An intestine still connected to his stomach is wrapped around his neck, resembling a scarf or a collar.

Violent, erratic and hostile to other Devils.

A man with a chivalrous attitude with a keen wit and very polite. At times he can short-tempered and abrasive with others even when trying not to be. He is a man above average-height and with a lean and semi-muscular physique, he is a swordsman born and raised in Japan. He is also very honest with others.