Seitarō Mukai is a Japanese entertainer known for his work as a comedian, radio personality, light novelist, and voice actor. He was born on February 27, 1980. Mukai is a member of the comedy duo Tenshin. His involvement in the anime industry often leverages his comedy background, extending beyond voice performance into concept development and script supervision.

As a voice actor, Mukai is confirmed to have a role in the anime series Ai-Mai-Mi. He appears in the franchise, which includes the season Ai-Mai-Mi: Mōsō Catastrophe, a surreal comedy about a high school manga club. His casting alongside the main voice actresses was noted in announcements for the series.

Beyond voice acting, Mukai has significant credits as a creator and production staff member on anime projects with comedy themes. He developed the concept for Get Up! Get Live!, a 2020 media mix project and short anime series centered on aspiring comedians. He also served as Joke Supervisor for the 2020 original anime television series Maesetsu!, which follows four girls training to become comedians. These roles highlight his primary expertise as a comedy professional within the anime medium.