Kenny Ackerman

Captain Ackerman is a member of the Military Police Brigade's central branch and also the anti-human suppression squad. He is responsible for the death of Historia's mother.

Appearance
Captain Ackerman is a very tall man who appears to be well built. He has short, coarse looking dark hair that reaches to his neck and also has a beard along his jawline. He has the appearance of a middle-aged man with wrinkles around his eyes, which are small and piercing. He is always seen wearing a simple white shirt with a black tie that is never fully done up, and a large black overcoat that reaches past his knees. He also has a bowler hat with a white band around it.

Personality
Captain Ackerman is an incredibly serious individual. He will do anything to get the job done including betraying Dimo Reeves, who had just turned over Eren Yeager and Historia Reiss. While he does not appear to take pleasure in killing, he certainly expresses no remorse at his actions.

Year 845
Captain Ackerman first appeared as a member of the group that arrived at the place Historia grew up. He grabbed her mother and asked Lod Reiss if her and Historia were related to him. Lod Reiss denied it and Captain Ackerman slit Historia's mother's throat while she wished that Historia had never been born. As another member approached Historia to do the same, Lod Reiss told them to stop and saved her life by telling her that her new name would be Krista Lenz, and she was never allowed to talk about what happened here.

The Uprising arc
Captain Ackerman next appears as the leader of the group sent to retrieve Eren and Historia from Dimo Reeves. Upon arriving he reminds Historia who he is and remarks how much she has grown. He brings Reeves outside under the pretense of giving him a payment. After luring him into the woods he asks Reeves if he knows who Levi Ackerman is, to which Reeves responds that everyone knows Levi but he had never heard his full name. Captain Ackerman tells Reeves that he personally trained Levi and then kills him in the same way he killed Historia's mother, claiming that it is his fault for Reeves' betrayal. A female assistant then tells him that Eren and Historia both had small knives on them but are still captured. He tells her to prepare the anti-human 3D maneuver gear, and then says that it is time for the anti-human suppression squad to show what they can do

Relationships
Levi Ackerman - Captain Ackerman trained Levi and they both share the same last name. He appears to have some respect for Levi since he called him his pride. The meaning behind their similar last names is currently unknown.