Biography
Keita Hagio is a Japanese animator and animation director whose credited work spans key animation, animation direction, and assistant animation direction across several hundred television and film productions since the early 2000s [1]. His animation director credits include multiple seasons of Mushoku Tensei: Jobless Reincarnation, entries in the Sword Art Online film series, and the Mashle: Magic and Muscles television seasons, alongside animation direction and key animation work on the Magical Girl Lyrical Nanoha franchise and The Testament of Sister New Devil [1]. He has also worked as a key animator on major long-running titles including Vinland Saga and Attack on Titan [1]. As with many career animators who work primarily on a freelance or per-episode basis, detailed biographical information such as his birthplace, birth date, or studio affiliation is not documented in publicly available sources; his professional record is drawn from the credits attached to the productions he has worked on.