Movie
Description
The Beast Titan possesses an ape-like physique covered in distinctive fur and exhibits exceptional intelligence, including the ability to speak human language with articulate communication. It commands Pure Titans through vocal directives, compelling obedience, as shown when it allowed Titans to consume Scout Regiment member Miche Zacharius after interrogation.

This Titan is Zeke Yeager, son of Grisha Yeager and half-brother of Eren Yeager. Zeke inherited the Beast Titan power via Marley's Warrior program, gaining transformation abilities and the 13-year lifespan curse of Titan Shifters. His royal bloodline from the Fritz family enables unique capabilities, such as partially activating the Founding Titan's power through physical contact with royal descendants.

Zeke demonstrates tactical acumen during the invasion of Wall Rose. He transforms Ragako village residents into Pure Titans using spinal fluid injections, creating diversions to infiltrate Paradis Island. His strategic coordination involves deploying Titans to test Survey Corps defenses and gather intelligence on military technology, including examining Omni-Directional Mobility gear after Miche's capture.

At the Battle of Shiganshina District, the Beast Titan employs long-range projectile attacks by hurling debris and utilizing transformed Titans as artillery. These attacks inflict significant casualties, nearly annihilating Commander Erwin Smith's forces. Zeke further displays mastery of Titan biology through spinal fluid poisoning, transforming ingested Eldians into Pure Titans.

Zeke's ideological conflict with Eren centers on opposing visions for Eldia's future. Zeke advocates euthanizing all Eldians to end the Titan curse and leverages his Beast Titan abilities toward this goal. Their temporary alliance fractures due to these irreconcilable differences. During their confrontation in the Paths dimension, Eren's access to the Founding Titan's full power overrides Zeke's influence.

The Beast Titan meets its end when Levi Ackerman severs Zeke from his Titan form during a distraction and eliminates him to prevent further spinal fluid transformations. Zeke's death terminates the Beast Titan lineage.