(For monokuma it's the same person being mono from the first one)

Monokuma:

Usami:

Nagito Komaeda:

Kazuichi Soda:

Mikan Tsumiki:

Gundham Tanaka:

Ibuki Mioda:

Nekomaru Nidai:

Fuyuhiki Kuzuryu:

Mahiru Koizumi:

Chiaki Nanami:

Peko Pekoyama:

TeruTeru Hanamura:

Sonia Nevermind:

Hajime Hinata:

Hiyoko Saionji:

Byakuya Togami: