Nanno provided us with satisfaction in Season 1 by portraying a character who has committed several sins and at the same time paying for them. KARMA is described by Nanno. It might not hit you directly at first, but it will inevitably hit you.
In some scenarios, whose KARMA is coming at you right away, but quite often it's not, KARMA is coming at you slowly but steadily. People were given rewards and punishments by Nanno. She also gave justice.
Not only that, but people learn from their mistakes. Remember Nanai and the Principal from the first and second episodes? That's the way Karma works.
Yuri views her as a representation of VENGEANCE. But vengeance isn't enough to bring about justice. In most cases, vengeance is carried out in response to a grievance.
Some would be desperate to give them to you. And what was the outcome? There's a lot of chaos and shady business happening on, and it's all pointless. Because of your deeds, there is no satisfaction after you have exacted your revenge.
And most of the time, we make the mistake of thinking that vengeance is KARMA. That's why, even at the end of season 2, Yuri has no idea how to do what Nanno does. She gave justice because she believed. THAT SHE IS KARMA. so Nanno always tells her that she still has a lot to learn.
So Nanno won't die dead because eventually, karma will still hit you. Even if it is the result of revenge, Karma will still chase you.