Robo Justice

 is a robot suit used in Danganronpa: Trigger Happy Havoc.

Appearance
Robo Justice is a tall blue, red, black, and white robotic-like being as his name implies. He has several multicolored joints and metal pieces that connect and make-up his metallic body. His shoulders are board and in the English versions has the initials for "Robo Justice" and in the Japanese version it has kanji.

Justice Hammers
Its possible the "Justice Hammers" used in Danganronpa: Trigger Happy Havoc 's Case 3 are what Robo Justice might use in his anime series. As such it can be speculated he delivers "justice" with them.

Origin
It is unknown where Robo Justice actually comes from in the Danganronpa universe, but similar to Hifumi Yamada's passion for an anime character named Princess Piggles, he has the same feelings towards Robot Justice. So it's very likely he's an anime character as well. This is further backed up by the fact Hifumi has merchandise modeled after Robo Justice, specifically a pair of underwear.

Chapter 3
Robo Justice is a cardboard suit created by Hifumi in order to frame Yasuhiro Hagakure for Kiyotaka Ishimaru's eventual murder. Celestia Ludenberg enlists Hifumi as her accomplice, by lying to him that Kiyotaka forced her to steal Alter Ego, and that he was planning to kill Hifumi. Later the two frame Hiro by putting him in the Robo Justice suit, and make it look like the robot was responsible for Hifumi's "kidnapping, both Hifumi's and Kiyotaka's “murders” and the "attack" on Celeste with the Justice Hammers.

Trivia

 * It it possible that Robo Justice is inspired by series.