The Japanese cast include Takehito Koyasu as Claudia Hoggins, Daisuke Namikawa as Gilbert Bougainvillea, Aya Endou as Cattleya Baudelaire, Kouki Uchiyama as Benedict Blue, Haruka Tomatsu as Iris Canary, and Minori Chihara as Erica Brown.
Kyoto Animation has revealed the third promotional video for it while also detailing that Minori Chihara has joined the cast as Erica Brown while Haruka Tomatsu has signed on as Iris Canary.
Additionally, Chihara will be performing the ending theme song “Michishirube” and it was revealed that Haruka Fujita will be handling the series direction.