Natsuko Kondou (Karakai Jōzu no Takagi-san chief animation director, One Week Friends episode animation director) is adapting Utako Yukihiro’s original novel character art for animation, and also serving as chief animation director.
Real-life jewel appraiser and Japan Jewel Patent Judgment Association representative director Naokazu Kudō is supervising the anime’s depiction of jewels.
Nobuko Toda (One Week Friends, Sweetness & Lightning) is composing the music.
Masakazu Kawazoe is serving as “Richard Supervisor” by overseeing the animation of Richard’s bearing and movement.