Beast Titan's Philosophy
Zeke believes that Eldians are cursed by existence and that the kindest solution is to prevent future generations from being born.
Royal Blood and Coordination
His royal blood gives him unique influence over Titans and access to Paths, which he tries to use to enact his plan.
Failure and Redemption
His alliance with Eren and eventual betrayal show how trauma can produce monstrous logic—and how connection can partly undo it.