Decargo Mieterman

A mysterious man in yellow who was seen having an argument with a mysterious man in pink outside of Sōseki Natsume's residence during Ryūnosuke Naruhodō's investigation into Viridian Green's attempted murder.

Personality
This mysterious man acted very irritably toward Naruhodō and the mysterious man in yellow with whom he was arguing.

Name

 * The name of this individual and the man he was arguing with are not given during Dai Gyakuten Saiban: Naruhodō Ryūnosuke no Bōken. However, the title of "Mysterious Man B" is given to this character in the game's artbook, while his counterpart is referred to as "Mysterious Man A".