Hashino elaborated on this particular character trait becoming an obstacle for Persona 4: The Animations director Seiji Kishi since the character would undoubtedly have to speak and show some level of emotion.
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Soejima compared him with the Blue Ranger from the Power Rangers franchise as such character tends to stand silent to follow the orders from his leader.
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For the anime, director Seiji Kishi expressed difficulties in giving the character emotions without damaging what the original staff created.