
Quick answer — Yoshinori Nakayama voices Rintarou Tsumugi in The Fragrant Flower Blooms With Dignity, Joukyuu Gaikotsu-hei in Sleepy Princess in the Demon Castle, Dansei Seisaku Shinkou in ZENSHU and 1 more characters.
Yoshinori Nakayama voices Rintarou Tsumugi (The Fragrant Flower Blooms With Dignity), Joukyuu Gaikotsu-hei (Sleepy Princess in the Demon Castle), Dansei Seisaku Shinkou (ZENSHU), Keedy (The Reincarnation of the Strongest Exorcist in Another World).
Rintarou Tsumugi is voiced in Japanese by Yoshinori Nakayama.