Komatsuzaki was a sculpture graduate before becoming involved with Spike, and Danganronpa was his first experience as a character designer.[1] The word "Danganronpa" originated from Komatsuzaki which was first written in kanji but it was later taken to katakana for the logo.[2]
For most games, he was in charge of designing characters with outstanding designs while the protagonist were meant to look like common people. As a result, Komatsuzaki designed Makoto Naegi character to wear a hoodie to complement his look, thinking the player was going to see his back a lot. After that, the artist added some character to his hair by adding an "antenna", and highlighted his "herbivore nature" by making him short. His coloring is subdued, but Komatsuzaki used a color palette he enjoyed.[3] He also redesigned the older cast members from the first Danganronpa for the anime sequel Danganronpa 3: The End of Hope's Peak High School to make them look more mature, and illustrated the characters for the spin-off novel series Zero, Kirigiri, and Togami.[4]
Besides Danganronpa, Komatsuzaki was one of many artists to design characters for Fate/Grand Order, an RPG mobile game based on the Fate/stay night series. He designed both Edmond Dantès and Cleopatra.[5] He was also the main artist for the anime series Akudama Drive from 2020. Cindy H. Yamauchi adapted Rui Komatsuzaki's original character designs for animation.[6] He also created a collaboration illustration between Danganronpa and the anime Akudama Drive in late 2020.[7]
