Kentaro is a high school freshman at the CLAMP School High School Division, in homeroom Z. He is a track and field star. After winning the championship, he is asked by the General to become one of the Duklyon Defenders.

Kentaro is highly energetic and talks too much. He is a great cook and is always trying to feed Takeshi. He aspires to be Takeshi's bride. He is the heir of the Higashikunimaru Corporation.