Quick answer — Gakuto Mikumo worked on Strike the Blood: Kingdom of the Valkyria (Orignial Creator), The Mystic Archives of Dantalian (Original Creator), Asura Cryin' 2 (Original Creator) and 7 more anime.
Gakuto Mikumo worked on Strike the Blood: Kingdom of the Valkyria (Orignial Creator), The Mystic Archives of Dantalian (Original Creator), Asura Cryin' 2 (Original Creator), Strike the Blood FINAL (Original Story), Strike the Blood III (Original Creator), Strike the Blood IV (Original Creator), Strike the Blood Second (Original Creator), Strike the Blood (Original Creator) and 2 more.
