When Kenny Ackerman first meets Uri Reiss, he’s at Uri’s mercy: Uri transformed into a Titan and grabbed Kenny with his big Titan hand, threatening to crush him. But he never does. When Kenny somewhat profanely begs for his life, Uri grants it. Uri understands the grudges the Ackermans hold against the Reiss, after all.
Instead of imprisoning or killing Kenny, Uri befriends and hires him. Kenny’s service ends the persecution of his family, but it’s too late for his sister Kuchel, whom he finds lying dead in a brothel…and a starving young Levi sitting in the corner.
Kenny thought he was the most powerful guy around…until he met Uri. And yet for all his power Uri was merciful; empathetic…compassionate. By throwing in with Uri, Kenny is still plenty powerful as well, and perhaps its for that reason he has the compassion not to let Levi die.
However, Kenny isn’t interested in being anyone’s father, so after teaching Levi how to properly survive in the cutthroat underground, he abandons him, leading to Levi’s present-day hatred of him. Meanwhile, Kenny is the last person Uri meets with before the ritual in which Freida eats him and gains his power.
He tells Kenny about the paradise he dreams of building within the Walls, and how even after he’s gone, Kenny’s services will still be required to realize that dream. The first time Kenny sees Freida after the ritual, he can tell Uri’s in there, looking back at him.
Kenny raises his paramilitary Anti-Personnel Squad, made up of the best of the best, and together they have many bloody adventures in the name of the Reiss. But all of that crumbled when Historia refused to keep the wheel turning and chose to break it instead.
With his squad all dead and his burns and wounds likely to take his wretched life any minute, Kenny ponders using the Titan serum he stole from Rob. But he doesn’t, and when Levi finds him, he points out how he could have injected himself at any time.
Like his friend Uri sparing his life, Kenny decides not to go the obvious path. In his last moments he thrusts the box containing the serum to Levi, his nephew, to do with whatever he pleases, and dies grateful he was able to experience the slightest glimmer of cool, pure compassion he felt emanating from Uri at all times.
Later, Historia is officially crowned before a vast audience, many of whom witnessed her slaying the Titan firsthand, and the rest of them hear the story, are impressed, and pass it on. Rather than more lies and secrets, Tori showed them something real and honest; an act that makes her worthy of the throne. Later, when she gives Levi a playful punch, Levi’s reaction is simply to laugh and thank her and everyone else for everything.
Everything looks primed to get shaken up again, as we check in on Bertholdt, Reiner, and the Beast Titan who is Eren’s father Grisha, and who desperately wants to reunite with his son. Not because he misses him,but because Eren is the Coordinate.