A plot point in the final chapters of Attack on Titan is how Ymir Fritz, The Founder, seemingly chose Mikasa Ackerman as the one to end the Titan Curse. Ymir's motivations and plans remained mysterious for a long time. And to this day, a line spoken by Eren has garnered a certain controversy: "Only Ymir knows". The problem with this plot point is that Ymir never speaks a single line, she never expresses her desires, and it was left to Eren and Mikasa to understand her.