As a result, Imposter became more developed as he showed his own identity and concern when looking after Ryota Mitarai, whom Kodaka referred to as a tragic character, due to how Junko manipulates him to steal his subliminal techniques. While returning from Goodbye Despair, a character only known as 'Ultimate Imposter' was revised, as in the original game he impersonated Byakuya Togami. Lerche's handling of the brief encounter between Izuru and Nagito earned recognition from the original creator, based on how both characters possess similar talents. He expressed doubts about Junko Enoshima, whom he deems his strongest villain. Izuru was described as a god-like entity, while Hajime was deemed a superior entity because he expressed more human qualities. In describing the cast, the writer said the anime helped to compare Hajime with his alter-ego Izuru Kamukura, whose characters saw little development in the game.

Meanwhile, Nagito Komaeda was written in a more lighthearted manner, which was easy for fans to spot. Nevertheless, Hajime's meeting with the real Chiaki was made an integral part of the narrative, based on how they bond when playing games. In it she is an artificial intelligence based on the real Chiaki who is killed by Junko. Chiaki was written to emphasize that she is not the same heroine from Goodbye Despair. This resulted in Hajime being written as having a more hateful manner, because of his lack of talents, until he met Chiaki Nanami. Compared to Goodbye Despair, Kodaka wanted the cast to differ from that in Despair. For example, the cast of Goodbye Despair is described as video game characters competing against each other in Monokuma's game, while the Future Arc would leave the impression, by the way the narrative is handled, that the cast are also anime characters. Kodaka suggested that, like the games, rewatching the anime would provide a different point of view of the series' nature.

The idea of dividing the series into two arcs allowed further exploitation of the concept of the mystery genre the games are known for. The work of the actors Megumi Ogata (left) and Toshiyuki Morikawa (right) moved Kodaka for their respective deliveries as Makoto Naegi and Kyosuke Munakata.

Danganronpa 3 hope arc characters