Rikimaru Ichinose (力丸一の瀬, Ichinose Rikimaru) is a long-time friend of Maki Zhijun and once defender of the Rukongai following his self-exile. A renowned and well-known Shinigami who once held the position of 3rd Seat of the 1st Division, Rikimaru was also the student of the late Genryūsai Shigekuni Yamamoto and joint teacher of Kenji Hiroshi during the latter's time in Soul Society.