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The information available does not confirm the roles of Elf from Hiratsuka in Kanagawa Elves, Human from Kawasaki in Kanagawa Elves, or Kunitomo in The Thousand Noble Musketeers as part of Ryōtarō Akazawa's voice acting work. The following profile is based on the verifiable information that could be found regarding his career as a performer.

Ryōtarō Akazawa is a Japanese actor and voice actor known primarily for his extensive work in stage productions, particularly in the realm of 2.5D musicals and stage plays based on popular anime and game franchises. He was born in Kanagawa Prefecture. His career in entertainment began in 2015, with his debut performance in the stage play CHaCK-UP-Episode.0-. Following his debut, he became a familiar face in the world of stage adaptations, appearing in productions such as A3!, Osomatsu-san on STAGE, Ensemble Stars! on Stage, and the musical adaptation of The Morose Mononokean.

While voice acting is a part of his professional portfolio, his work as a stage actor has been the more prominent focus of his career. One of his confirmed voice roles is Teddy in the anime series High Card. He was announced as a guest cast member for the series special episode, High Card: The Flowers Bloom, which was made available for streaming in November 2024. In this episode, he voiced the character Teddy, described as a subordinate with a strong physique. This role represents a notable achievement within his work as an anime voice actor.