Lara Tybur

"Brother. You have fulfilled your...duty...as a Tybur."

- Willy's sister commemorates her brother's legacy

Willy's sister (ヴィリーの妹) was an Eldian noble living in Marley, the younger sister of Willy Tybur, and secretly an inheritor of the War Hammer Titan.

Human form
Willy's sister was a lady of inconspicuous appearance, standing relatively tall with dark eyes. Her hair was dark and slightly wavy, kept behind her head in a bun, and her facial features were small and gaunt. She wore a black and white dress of modest design.

Titan form
As the War Hammer Titan, Willy's sister possessed a muscular masculine body standing at a height comparable to the Attack Titan. The head of her Titan was covered by what appears to be a second layer of skin shaped like a cowl covering its ears and much of its face, with only its eyes, mouth, and jaw exposed through a segmented mesh of skin. Her Titan carried a massive war hammer of hardened Titan flesh standing at around twice the height of its body.

History
At some point within the past thirteen years, she inherited the power of the War Hammer Titan, though her inheritance of this power was kept a closely guarded secret. Upon inheriting the memories of her predecessors, she shared her knowledge with her brother Willy, who was stunned by the revelations she inherited.

Marley arc
When the Tybur family arrives in Liberio for the upcoming festival following the Marley Mid-East War, Willy's sister joins her family to take up residence in the city. The owner of the military headquarters is informed of her identity as the War Hammer Titan, and he is later ordered to leave the premises. Willy's sister joins her family to watch Willy's production from backstage when the night of the festival arrives, where he shares the knowledge of the Great Titan War which he learned. Suddenly, the production comes to a halt when the Attack Titan bursts forth from the building behind the stage, killing Willy and starting a rampage. Willy's sister survives the destruction of the stage and honors her brother for his work, starting her transformation into the War Hammer Titan. However, the Attack Titan turns to assault her before her transformation can complete, relentlessly beating her Titan with hardened fists. She eventually regains the advantage, using the power of her Titan to impale the Attacker on a massive pike of hardened Titan flesh while she regenerates her body. Upon fully regenerating her Titan, Willy's sister generates her Titan's signature war hammer to finish off the Attack Titan. It evades her first swing but is caught in a trap of spikes created by the War Hammer. Without any desire to consume the Attack Titan to gain the stolen Founder, Tybur decapitates the Attack Titan, exposing Eren Yeager, usurper of the Founding Titan, within the Attacker's nape. She asks Eren if he has any final words, and in that moment he calls out for Mikasa to strike. Unaware of the counterattack, eight explosive rods are shot into the War Hammer's nape, detonating as Mikasa maneuvers around the Titan. Willy's sister's War Hammer collapses from the devastating blow. Despite the complete destruction of the War Hammer's nape, Willy's sister is able to construct a crossbow, and fires a bolt towards the Attack Titan's nape. The strike is barely dodged, and forces Eren to abandon his Titan's body. Willy's sister engages Mikasa, who continues to barrage her Titan with Thunder Spears, though to little effect.

Meanwhile, after realizing that the true location of Willy's sister's body is behind the stage, Eren transforms again and grabs the crystal encapsulating her body. After snapping the cable of flesh connecting Willy's sister to her Titan, the War Hammer collapses. Eren goes to devour the crystal, though the attack of the Jaw and Cart Titans are able to distract Eren while a new cable is made, connecting to the ground. Eren is given only a few moments realization before his Titan is impaled by numerous pikes, stemming from the War Hammer's new body.

Having spent all her energy in the last attack, Willy's sister finds herself unable to pierce the Attack Titan's nape through its hardened forearm. Mikasa fires a Thunder Spear at her crystal, yet fails to even crack it. Later, the Attack Titan attempts to bite the crystal again, but is unsuccessful and breaks its teeth on the hardened surface. Declaring that the War Hammer is out of moves, Eren exits his Titan's nape and transforms again, picking up the crystal in his new Titan body. Willy's sister is seen observing the battle between both the Attack and Jaw Titans; she is visibly surprised and worried when one of the strikes from the Jaw Titan causes some damage to the crystal surrounding her. The Attack Titan takes note of this as well and devises a plan to exploit this newfound revelation; after disabling the Jaw Titan, the Attack Titan jams the crystal containing Willy's sister into the mouth of the Jaw Titan and begins to squeeze. Both Willy's sister and Galliard realize what the Attack Titan is doing but are powerless to stop it; Willy's sister silently acknowledges her fate as the crystal around her fragments and shatters, ripping her to shreds and causing her remains to be eaten by the Attack Titan.

Power of the Titans
Willy's sister had the ability to transform into the War Hammer Titan (戦槌の巨人).
 * Structural hardening: The signature ability of Willy's sister's War Hammer Titan was the power to effortlessly generate massive spike-like structures out of hardened Titan flesh, ranging from ground spikes small enough to go unnoticed by other Titan opponents or massive pikes large enough to impale the Attack Titan far above the ground. This structural hardening also allowed for the War Hammer to create objects such as weapons, notably the signature war hammer for which her Titan is named. Much like the Female Titan, Willy's sister could use this ability to encase herself in a crystalline barrier, though she retains consciousness in order to be able to control her Titan body.


 * Regeneration: Like all others with the power of the Titans, Willy's sister was able to regenerate any wounds received in battle. After receiving a devastating barrage of punches from the Attack Titan with no defensive measures, she was able to fully regenerate her Titan's missing flesh and limbs in a matter of minutes.

Her only weakness appeared to be low levels of stamina. She was able to fully transform only once, and then was able to manage a second (although partial) transformation during her battle against Eren and the Survey Corps before running out of energy.
 * Remote operation: While encased in crystal, Willy's sister could create a body of a Titan to be remotely controlled from a distance, enabling her to regenerate her entire Titan body without sustaining any damage to her human form, as well as circumventing the typical weakness of the Titan's nape. The crystal and the Titan body were connected to her through a long cable of flesh. When this ability was utilized, she generated the body of the War Hammer Titan from the feet upwards rather than from the nape outwards.

People killed

 * Previous inheritor of the War Hammer Titan (as a Pure Titan)

Failed attempts

 * Eren Yeager
 * Mikasa Ackerman

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