Koh

Koh (コウ) is a rising Tamer in the Light Fang organization, and is Sayo's main rival; by the end of her story, he has attained the rank of Platinum Tamer. His design is the male version of the protagonist from Dawn. He is partnered with Coronamon (who digivolves to Firamon, then Apollomon), RizeGreymon (who digivolves to ShineGreymon, then ShineGreymon Burst Mode), and Angemon (who digivolves to Seraphimon), and his NaviDigimon is Gatomon. Koh's name is likely derived from "kou" (光).
 * In Dusk, Sayo faces him during the Normal Tamer Tournament, the "Light Fang Assault" quest, and the Legendary Tamer Tournament. However, he is the only Light Fang Tamer to not fall under the ChronoCore's control; and soon after "Light Fang Assault" he escapes Sunshine CITY and allies with Night Claw to save his team, even battling Kowloon Co. with them. They use his Digivice to create an access portal to Sunshine CITY, and he even lends Sayo his Digivice to help her pass through. His teams are:
 * Normal Tamer Tournament: RizeGreymon, Coronamon, Angemon
 * Night Crow Assault: RizeGreymon, Firamon
 * Legendary Tamer Tournament: ShineGreymon, Apollomon, Angemon
 * In Digimon Story: Lost Evolution, Koh's ShineGreymon Burst Mode is fought in the Legend Tamer Battle alongside and a Gallantmon Crimson Mode.
 * In Digimon Story: Super Xros Wars Red and Blue, Koh is fought in the Silver Tamer Match and leads Team Sunburst (サンバースト). His Digimon are:
 * Round 1:, , and Hououmon
 * Round 2: Seraphimon, Apollomon, and ShineGreymon Burst Mode