Mitwomiki

Mitwomiki is the poly ship between Ryota Mitarai, Ultimate Imposter and Mikan Tsumiki from the Danganronpa fandom.

Canon
Ultimate Imposter met Ryota Mitarai prior to the events of Despair Arc, after the latter collapsed on the floor in a hallway. After doing research on him, Imposter suggested he'd take Ryota's identity so that the Ultimate Animator could focus on working on his anime. Imposter has been visiting Mitarai ever since, bringing him food and drinks.

After Ryota neglected his health again, Imposter brought Mikan Tsumiki to nurse him back to health. After doing that, Imposter shared his and Ryota's secret with her. The two have been visiting Ryota together ever since.

After being brainwashed by Junko Enoshima's Despair Video (an early version), Mikan attempted to have sex with Ryota while explaining the video to him.

In Hope Arc, both Imposter and Mikan, along with their other classmates and Hajime Hinata/Izuru Kamukura, told Ryota to join them in atoning for their sins on Jabberwock Island. The group forgave each other their past mistakes.

In the bonus mode of New Danganronpa V3, there is an event where Ultimate Imposter brings Hifumi Yamada to Mikan after the Ultimate Fanfic Creator was overworking on his doujins. Imposter comments that he had Mikan help his friend in a similar situation, meaning their friendships in the universe of this bonus mode are similar to the ones from Despair Arc, with only exception being Imposter still being disguised as Byakuya Togami.