Ооніші Кейґо

Oonishi is the leader of Organ and one of our protagonists. When he was younger, he was somewhat tricked into selling his legs to Kanno. His legs were replaced with Texhnolyze legs that allow him to hear the 'voice of the city', which are visions the Mothers send to him about things that will happen in Lux. Most of the main council of Organ had some kind of qualm with Oonishi, first and foremost being his passive nature. Even on the battlefield, he prefers to not kill his opponents. In the office, he believes in talking things over first before starting an unnecessary war. This causes a number of the council members to try and oust him out of office.

First was Mizuno, who used Yoshii's interference in Lux's affairs to place blame on Oonishi for being too conservative. He gets his wishes and has Oonishi on the run after the large skirmish between Organ, the Alliance, and Lakan. Soon after, his wife is taken hostage by Yoshii and is killed in a skirmish. With the help of Touyama, he uncovers Yoshii's plot and manages to save Goto and Class Dude from being assassinated before being gashed across the chest by Yoshii. Ichise saves him and he is eventually able to recover. While he was recovering, Mizuno's plot was also uncovered due to Touyama and Ichise's detective work and he was reinstated as leader of Organ.

He goes and visits the Elder of Gabe, who was a long-time ally of Organ, to see if anything can be done about the current disarray of Lux. The Elder has him listen to Ran's prophecy in which she tells Oonishi that 'what you lost is coming to destroy you', insinuating that Kanno will soon arrive. While there, he uncovers Gabe's new alliance with the Class and is betrayed a second time by Mizuno. However, he is saved from being killed by Ichise. He takes Ichise under his wing around this time. He realizes the potential that Ichise has and wants to try and get him to focus it on things other than blind rage.