5 unnamed Ignis
|Anime debut||Episode 1|
Five years before the start of the series, Revolver assaulted "Cyberse" with "Cracking Dragon" with the intention to destroy it. The different Artificial Intelligences that protected it were restrained by Revolver and thus unable to stop the destruction of their world. However the AI Ignis appeared and forced a disconnection of the Cyberse World from the rest of the network, thus forcing Revolver out of Cyberse while keeping its location known only to him. However, Revolver, furious by Ignis' interference, ordered his "Cracking Dragon" to capture Ignis, which led to the AI to be dismembered by the monster's jaws. This made Revolver and the Knights of Hanoi spend the following years searching for Ignis' parts in order to find the location of Cyberse. SOL Technologies is also searching for Ignis because without Cyberse, their network will continue to deteriorate, having already dropped 30% by the time the series started.
|Main||Aoi Zaizen • Go Onizuka • Yusaku Fujiki|
|Den City||Aoi Zaizen's robot • Den City orphanage owner • Eagle • Emma Bessho • Frog • Go Onizuka's manager • Hosoda • Isomaki • Makoto Kimishima • MC • Naoki Shima • Pigeon • Roboppy • Shoichi Kusanagi • Tanaka • Sato • Suzuki|
|SOL Technologies||Akira Zaizen • Bishop • Hayami • King • Knight • Kitamura • Pawn • Prototype Ai-A • Prototype Ai-B • Queen • Rook|
|The Knights of Hanoi||Doctor Genome • Faust • Kyoko Taki • Kiyoshi Kogami • Revolver • Specter|
|Other characters||Jin Kusanagi|