The protagonist works at a major insurance company. Due to his strong curiosity, broad knowledge of unusual subjects, and low emotional range (calmness), he is considered somewhat eccentric. Currently, he is searching for the whereabouts of the Satoshi Code.

A newcomer at a sports equipment manufacturer. She is good at physical activities and has the ability to handle everything from ball games and martial arts to parkour. She has an innocent and naive personality and tends to be clumsy, but also has a devoted side.

Mitsuhiro's colleague at the major insurance company. His always light-hearted tone and propensity for saying upbeat things don't earn him the best reputation at work. However, he treats everyone the same and has good performance due to his adaptability.

A mysterious woman involved in the underworld, her real name and age are unknown.

A gentle and soft-spoken beautiful doctor. While she can be very compassionate towards others, she can also be overly kind and timid.

An orphan who lost his parents in an accident, he was picked up by a Yakuza boss when he was causing trouble in the city. Due to his sharp mind, he is able to skillfully manipulate those around him, earning their trust and respect, eventually leading a group of followers at a young age.