It was run here, once. Altered, slightly, to be run with groups of three. Those that trusted each other mutually would be harmed, and those that betrayed mutually would be harmed worse. But if one unit were to betray a single unit or pair of units that trusted them, the unit that chose to trust would be permanently altered.

[ He emphasizes the last part, looking down at his hands then meeting Mars's eyes ]

My grudge is not that his unit chose to betray, but the actions he took following the betrayal. Taisho realized it was a possibility we faced, but I decided I would rather risk myself than put the permanent harm of another at stake. In choosing to betray, your brother ought to have considered the risks. I could have understood it had he stood by his convictions, and said simply that he had done it to protect his own unit. Bad End, like Taisho, cannot rely on other units to protect us. But instead he acted stricken, as if Taisho had pulled the lever of the traitor. He made excuses, talking about us misunderstanding the message his unit sent.

[ His folded hands tense, knuckles paling. ]

Taisho ultimately decided the message did not matter. I could not sentence another to my fate. It is his inability to take responsibility for the damage done that I hold against him. He did not make a mistake, and Taisho did not err and choose incorrectly. He made a choice and only after it was unable to be taken back did he consider the consequences. His excuses are inexcusable.