The Beast Titan stands at 17 meters and is unique among the Nine Titans because its appearance changes radically depending on the user's traits and personality. Zeke Yeager's Beast Titan took the form of a massive ape-like creature with incredible throwing accuracy and devastating battlefield control. Tom Ksaver's version before him resembled a ram, showing the Titan's form is not fixed. The Beast Titan's powers make it one of the most dangerous Titans from a distance.
Zeke's Beast Titan has a long, ape-like body covered in dark brown fur with extremely long arms that reach nearly to the ground. Its face resembles a gorilla with a pronounced brow ridge, flat nose, and small intelligent eyes that glow yellow. The body is hunched forward with broad shoulders and a thick chest, designed for powerful overhead throwing motions. Long fingers and opposable thumbs give it the manual dexterity needed to grip and hurl objects with surgical precision.
The Beast Titan can throw objects at devastating speeds with incredible accuracy, able to destroy ships and kill enemies from hundreds of meters away. Zeke could turn Eldians into Pure Titans by injecting them with his spinal fluid and then control them using his royal blood and a scream. The Titan can also speak clearly through its mouth, unlike most Titans that lack the vocal anatomy for speech. Its long arms give it superior reach and climbing ability, making it effective in terrain with vertical elements. The Beast Titan's form adapts to the user — a ram form for Tom Ksaver and an ape form for Zeke — suggesting it reflects the inheritor's personality.
Tom Ksaver was a Marleyan warrior scientist who held the Beast Titan before Zeke, taking the form of a ram and researching Titan biology for decades. Zeke Yeager inherited it from him and became the most fearsome Beast Titan user, leading the assault on Paradis and nearly destroying the Scout Regiment. In the final battle, the Beast Titan was destroyed by Levi, who had sworn to kill Zeke after Erwin Smith's sacrifice.