Yelena is the leader of the Anti-Marleyan Volunteers working under Zeke Yeager. She was one of the Marleyan soldiers on board the first survey fleet to Paradis Island after Marley's failed attack operation.
Yelena is a very tall woman with her blonde hair styled in a short bob with straight bangs. She has large black eyes, thick eyelashes and somewhat androgynous features due to her build and style. She also sports a chinstrap beard, which is later revealed to be fake. Originally, Yelena wore the standard Marleyan military uniform, but after disaffiliating she began wearing a casual white button-down with a dark blazer and pants.
Yelena is a deeply intense and driven character, with a personality shaped by her unshakeable beliefs and fierce loyalty to her ideals. One of her most defining traits is her near-religious reverence for Zeke Yeager. To Yelena, Zeke is not just a leader but a visionary with a grand plan to free the world from suffering, consisting in euthanizing all Subjects of Ymir in order to end the Titan powers once and for all. She sees him akin to a savior, her admiration bordering on idolatry. Her loyalty to Zeke is absolute, and she sees herself as a chosen disciple helping him achieve his goals. And many have noted that Yelena is somewhat deranged in her zealotry; if any of her comrades are thought to be working against their goals or insult those whom they are ultimately trying to save, Yelena will come forth and kill them without hesitation.
Appearance: Yelena is a very tall woman with her blonde hair styled in a short bob with straight bangs. She has large black eyes, thick eyelashes and somewhat androgynous features due to her build and style.
Personality: Yelena is a deeply intense and driven character, with a personality shaped by her unshakeable beliefs and fierce loyalty to her ideals. One of her most defining traits is her near-religious reverence for Zeke Yeager.
History: Born into an unassuming family in Marley, Yelena eventually became disillusioned with her own country. After meeting Zeke Yeager, Yelena concocted a plan to solidify herself in history by assisting Zeke in saving the world.
Yelena in the story: During the early stages of the Marley Mid-East War, Yelena and her comrades were placed in a situation where they completely lost their will to rebel against Marley. However, Zeke Yeager saved them from the clutches of death, rejuvenating their fighting spirit, and inspiring Yelena. She also becomes a devoted follower of Zeke, to the extent where she considers him a God.
Source: Attack on Titan Wiki, available under CC BY-SA 3.0.