Ken'ichi Yamamoto
Birthdate December 26
Gender Male
Species Shinigami
Affiliation Soul Society
Occupation Headmaster (Great Archives)

Ken'ichi Yamamoto (山本 研一; Yamamoto Ken'ichi) was a relative of Genryūsai Shigekuni Yamamoto and Headmaster of Soul Society's Great Archives.


Its name is Omoimaru (思マル).

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