Famitsu revealed which character is being voiced by each seiyuu:

Akamatsu Kaede - Sayaka Kanda



Amami Rantarou - Hikaru Midorikawa



Iruma Miu - Haruka Ishida



Ouma Kokichi - Hiro Shimono



Keebo - Tetsuya Kakihara

Gokuhara Gonta - Shunsuke Takeuchi



Saihara Shuuichi - Megumi Hayashibara



Shirogane Tsumugi - Mikako Komatsu



Shinguuji Korekiyo - Kenichi Suzumura



Chabashira Tenko - Sora Tokui



Toujou Kirumi - Kikuko Inoue



Harukawa Maki - Maaya Sakamoto



Hoshi Ryouma - Akio Ōtsuka



Momota Kaito - Ryōhei Kimura



Yumeno Himiko - Aimi Tanaka



Yonaga Anjii - Minori Suzuki



Monokuma - TARAKO

Monokumars - Kōichi Yamadera (All five of them)