Yelena

Yelena stands as one of the most chilling and pivotal figures in the latter half of Attack on Titan. Masterfully concealing her true allegiance beneath a Marleyan uniform, she embedded herself within the Survey Corps to quietly advance Zeke Yeager's harrowing Euthanasia Plan. To Yelena, Zeke transcends ordinary humanity — he is nothing short of a messianic force destined to reshape the world. Fueled by this near-religious fervor, she operates with a terrifying blend of calm composure and merciless efficiency, eliminating any obstacle that dares stand between her and her god's vision. Her presence alone was enough to shatter the story's equilibrium.