Tengan Kazuo

A character from Danganronpa 3.

Create Hope to Create Despair to Create Hope
What if make killing game where anything could happen... to make single dude in it despair and stream brainwash video to youtube? This is great plan.

Season 0
Seemingly a peaceful old man that lets youngins have their way as Chairman of KaibaCorp, he is in reality a complex and sadistic mastermind with grand plans. Although originally a pacifist, he became this way after witnessing a most despairful event: finding out dancing cat videos were, in fact, not real.

Since then, he saw as society sank into despair and crafted a plan to save it: by convincing KaibaCorp CEO Kaiba Seto to go along in the scheme, and using him to go with his plan of mass-producing an army of daunting robots, KaibaCorp would take over the world as a company lead by an evil Dragonlord behind it, and plunge it into the greatest despair... and he knew, that somehow, somewhere, from that despair, a single twink would find a way (probably through brainwashing) to make everyone have the greatest hope... maybe.

From the shadows he continued his plans, and prepared for the one that would soon try to stop him.

Episode 14

As Kasuga Ichiban's group ventures into KaibaCorp HQ, Seeker warns them that he was lucky to escape alive the first time, but Ichiban then notices the place looks exactly the same, which Seeker admits is because their chief engineer is gone, but they still managed to produce enough models to take over the world. Jason ambushes the party with two brand new Robo-Kiryu models, but before the situation turns hopeless, Jack make his return; while he was gone, he came to understand what Chaos' nature truly was, something that destroys friendships, and because of that they need to take down Chaos together... even Okada too.

As Ichiban has something to settle with the Dragonlord, his party takes on the threat while he stays in the backguard in a support role. After (half of) the group beats their asses, Ichiban finds the key to the main office, but they feel the entire rest of the production line coming for them. Before the robots have a chance to stop them, Okada's CHAOS' allies show up to back him up, and Evil Itself admits that even if he may not be as powerful as Kiryu, Ichiban really can be a Dragon too after all. However, the robot army arrives and still far outnumbers them... but the person who has witnessed Ichiban's adventure from the start arrives: The Bartender, who brings along three mercenaries who were having a drink at his bar: Depp, Hopper and Bathhouse Owner. With so many people helping them, the party ventures further into the Dragonlord's lair.

What they find, instead, is an empty office. Sinbad moves away from the party and congratulates Ichiban, because the Dragonlord has been slain... many weeks ago, in fact, all thanks to Ichiban drawing his attention, as Sinbad infiltrated while they were disposing of his body and headcranked his neck. Sinbad became CEO of KaibaCorp which is now part of Sindria Trading Company, and Ichiban getting thrown into a dumpster instead of a hospital was also all arranged by him. But why would someone do that to the very knight he hired, asked Ichiban, and the answer is... he's not even really sure himself. Kasuga can't take the betrayal trope anymore, and even if Sinbad tells him to control his emotions, he can't take someone betraying his quest like that, so Sinbad arranges a deal: defeat him and he'll get his quest reward, lose and... he'll see.

But a hero never stops fighting, even if he has to overcome the unexpected. So even if he's not good enough to defeat the legendary ruler of the seven seas, he can give his all in one last attack in his final turn, leaving both on their knees. Suddenly an opportunistic old man enters and shoots at one of them, but Serge takes the blow as he says "I've been waiting for this" and Sinbad tries to congratulate him for doing as they planned, but another blast was more than he expected and blows him away. This man, Tengan Kazuo, was the reason Sinbad put on such a show on the first place and attacked Ichiban to lure out; this man was the person pushing KaibaCorp as its real chairman towards the path of world domination, his goal to make KaibaCorp so abominable to create the greatest despair, which would birth the greatest hope.

However, what he hadn't realized is that he lost the moment Serge drew him out from the shadows and made him visible on-screen; Sinbad's plan B activates and Sakakura Juzo lands over the chairman while on top of 20 or so piles of ladders. Sinbad thanks him for accomplishing the favor he owed him, and Juzo leaves thanking Sinbad instead for welcoming Yu into their country now that Chuck's closed. Ichiban is still confused, but now that its all over Jack and the rest go give the Karaoke machine a rematch, leaving Ichiban behind as he keeps asking questions...

Trivia

 * One of the most complex old men.