Dia Mitsumoto is a fictional character from Mahjong Hishouden: Naki no Ryuu. She is portrayed as a notable mahjong player within the story, contributing to the series’ competitive atmosphere and dramatic tension. As part of the cast, Dia represents the skill, strategy, and psychological pressure central to the series’ mahjong matches. Her presence helps highlight the intensity of the game and the personal rivalries or challenges faced by the characters.