|Height||17m (Titan form)|
|Species||Human, Titan Shifter|
|Manga||The Beast Titan|
|I was pretty sure we speak the same language... Or you're so frightened that you can't speak...|
|— The Beast Titan to Mike Zacharius|
The Beast Titan (獣の巨人 Kemono no Kyojin?) is a mysterious Titan Shifter that was first seen within Wall Rose during its supposed breach, and was responsible for the transformation of the people of Ragako into Titans. He has some connection with the people of the Homeland.
In his human form, he has a well toned body, shaggy blonde hair and a matching moustache that transcends down into his beard. He was seen wearing no shirt, loose pants, combat boots, and circular glasses. He has a large scar running down his left arm.
In his Titan form, he is an extremely unusual specimen, having a distinct, ape-like appearance. His body structure and facial features are like that of a human's; he walks upright like one also. He stands at a previously unseen 17 meters in height. Dark fur covers the large majority of his body, with the exception of his face, hands, feet, and torso. His arms are also elongated, with long fingers and fully-functional thumbs. The proportions of his upper body are similar to those of the Colossal Titan, possessing a massive chest and small head, as well as unusually slim arms. He is also one of the few titans known to have the ability of sentient communication with humans, including use of the human language while in titan form.
He has the traits of a leader, giving orders and telling other people, even Titans, what to do. While he was talking with Mike, he told the Titan that was eating him to hold him instead of devouring him. If his orders are not followed, he does not hesitate on using brute force, like when he killed the Titan that was eating Mike  or the time when he pummeled Reiner to make him and Bertolt follow his plan.
Also the Beast Titan seems to be a cruel, sadistic and sarcastic individual. He killed several human soldiers and he let a group of Titans eat Mike when he stopped being useful, not caring about the pain that he was about to endure. Instead he mocked him, saying that he discovered that they speak the same language.
StoryMike Zacharius, who instantly notes the strangeness of his characteristics. The Titan displays an unexpected behavior when he grabs Mike's horse and launches it at him, preventing his escape and throwing him from the roof he was on.
After Mike falls to the mouth of another Titan, the Beast Titan displays the ability to speak, ordering the other Titans to not eat him so that he can question Mike about the 3D Maneuver Gear. However, the Titan disobeys him and the Beast Titan crushes its head to release Mike.
The Beast Titan then proceeds to interrogate Mike, but as he neglects to respond out of shock, he theorizes that Mike does not speak due to them not speaking the same language, or Mike being too afraid. After inspecting the gear, he allows the surrounding Titans to devour Mike. As Mike screams in horror, the Beast Titan is amused to see that they did actually speak the same language after all.
As the soldiers manage to fend off an attack, he suddenly turns his attention towards them. He begins to break off chunks of the Wall, hurling them long distances at the members of the Survey Corps trapped in Castle Utgard. The first shot kills their horses, and the second kills Lynne and Henning.He then howls, summoning more Titans to continue the assault on the castle. Nanaba angrily notes that he seems to be intentionally toying with them. Afterwards, he climbs over the Wall and disappears into the lost territory of Wall Maria.
When Ymir and Eren are kidnapped by Reiner Braun and Bertolt Hoover, Ymir states that the Beast Titan is directly responsible for the appearance of Titans within Wall Rose; possibly in order to "test" humanity's strength. She also notes that the reaction of Reiner and Bertolt to his appearance resembled gawking, excited children. She theorizes that locating him must be one of their primary goals and that it is key for them to return to their village.
In the aftermath of Eren's failed kidnapping, an investigation is performed at the village of Ragako. The investigation confirms the suspicion that the villagers had been transformed into Titans, though the methods employed by the Beast Titan remain undisclosed.
Two months after Historia Reiss is crowned queen, the Beast Titan is shown in Shiganshina District defeating the Armored Titan in battle. While Bertolt takes out Reiner's body from his Titan form, the human within the Beast Titan emerges from his Titan body, telling Bertolt and Reiner to worry about Annie's rescue later. He then reveals his plan to ambush the Survey Corps in Shiganshina with their help in order to capture Eren and steal the Coordinate, their top priority.
This Titan Shifter is able to transform into a 17 meters Titan referred to as the Beast Titan (獣の巨人 Kemono no Kyojin?) in the series. He used his when he transformed the inhabitants of Ragako, wandering between the walls in his Titan form, and when he fights Reiner in Shiganshina District, so that he follows his commands. It is unknown how he gained his power. He retains his human mind even during transformed, allowing him to do delicate tasks of even speaking.
Beast Titan's Statistics :
Unlike other Titan Shifters, he is able to fluently speak without issue in his Titan form, casually talking to other Titans and even giving them orders. He possesses great physical strength, sufficient enough to pick up a horse or even break off large chunks from Wall Rose and hurl them at a great distance away. He also seems very skilful because it managed to retrieve Mike's Three Dimensional Maneuver Gear without damaging him or the gear.
He is revealed to possess some unknown means to transform humans into Titans. These Titans, unlike the regular Titans encountered, were capable of functioning at night. As many houses showed signs of the transformations taking place indoors, it does not appear that immediate physical contact is required to cause a transformation. Also, these Titans seem to obey his orders.
He seems to be a very formidable fighter, since he was able to defeat the Armored Titan and inflict him considerable damage without sustaining any visible injury. He is also mentioned as "the most powerful Titan".
- Reiner Braun and Bertolt Hoover - The Beast Titan has some connection with them, since one of the reasons why the two boys joined the Survey Corps was to find the Beast Titan. The Beast Titan seems to know them too, because some time after they flew away with Ymir, the Beast Titan fought Reiner in order to make him and Bertolt follow his command.
- Annie Leonhart - Little is known about their relationship, but after he defeated the Armored Titan on a fight, he told him that Annie could be saved after retrieving the Coordinate, prioritizing the power over Annie, who was supposedly being tortured.
- The Beast Titan's appearance resembles several cryptids, such as the Sasquatch/Bigfoot, Yeti, and Yowie.
- He appears to have had limited to no contact with the humans inside the Walls for a long time, as he expresses interest in humanity's 3D Maneuver Gear. He also wonders whether or not he speaks the same language as Mike.
- He ranks 3rd on the Titan Popularity Poll.
- He makes an appearance in Attack on Titan: The Last Wings of Mankind.
- Hajime Isayama has unofficially showed a "mysterious character" in Japan, which resembles the Beast Titan's human identity.
- He is the only human/Titan Shifter seen so far whom regular Titans do not attempt to attack.
- In the final notes of chapter 70, the Beast Titan is described as "the most powerful Titan". However, this is contradictory with his stats revealed in the guidebook INSIDE & OUTSIDE where he got a 7 (of 10) in "power", being surpassed by the Armored Titan with 8 and the Colossal Titan with 11.
|What an interesting thing they invented!|
|— The Beast Titan talking about the Three Dimensional Maneuver Gear|
|Don't you know you should be trying to retake the Coordinate?|
|— The Beast Titan to Reiner Braun|