| The subject of this article has no official name.|
It is a fan-given name as substitute for lack thereof, and should not be considered as part of the Attack on Titan universe.
Mr. Ackerman appears to be in his mid 30's. He had short light-colored hair with light-colored eyes, as well as a little stubble on his chin.
In the year 844, Mr. Ackerman is at home with his pregnant wife and daughter. Mikasa asks her father where babies come from and he sheepishly lies that he does not know and suggests she ask Dr. Yeager when he arrives. Mr. Ackerman hears a knock on their door and opens it to welcome Dr. Yeager and his son Eren.
Later in the day, Mikasa and Eren return from an adventure in the woods and tell the adults that they found three bodies in the woods. Sometime later, Mr. Ackerman tells his family that the Military Police reported that the bodies found in the woods belonged to slave traders and questions about what they were doing in the woods. Mr. Ackerman and his wife both feel a wave of discomfort come over them.
Sometime later, the Ackerman family is having a meal when Mr. Ackerman notices Mikasa sighing. He asks her what is wrong and she replies that nothing is wrong. His wife then tells him that Mikasa is sad because she has to wait nine more days before she can see Eren again.
A few days later Mrs. Ackerman catches a fever and is bedridden for three days so Mr. Ackerman sends a letter calling for Dr. Yeager. Dr. Yeager tells the two that her fever is going down and that he will start visiting more frequently to make sure the baby is healthy.
After a later visit from Dr. Yeager, Mr. Ackerman notices that Dr. Yeager has forgotten his hat. Seeing a chance for Mikasa to spend more time with Eren, he decides to let Mikasa deliver the hat. Mr. Ackerman sends Dr. Yeager a letter informing him of Mikasa's visit. He then brings Mikasa to the docks and sees her off as she takes a ship to Shiganshina.
Several weeks later, Mikasa asks her father for a pen and paper so she can write a letter to Eren.
During the winter, Dr. Yeager reveals that Mrs. Ackerman has pregnancy toxemia which might harm her baby should her condition get worse. He suggests that the Ackerman family should move to a home near his own in Shiganshina District, so he can come right away in case something happens. Five days later, the Ackermans with the help of Dr. Yeager move to Shiganshina. While unpacking, Mr. Ackerman tells Mikasa that she can go to Eren's house to play with him.
Later in the day, Mikasa sees a vision of her parents getting attacked by the three men she saw in the woods.
As Mrs. Ackerman was close to giving birth she was moved to Dr. Yeager's house and Mr. Ackerman goes with her. Later in the night, Mrs. Ackerman gives birth and the Ackermans joyfully look at their newborn child.
- Mikasa Ackerman - Mikasa is his only daughter, together they lived a simple life with his wife in their cabin in the woods.
- Mrs. Ackerman - Mrs. Ackerman is his loving wife, together they lived a simple life with their daughter in their cabin in the woods. The two of them expected a second child and Mrs. Ackerman later gave birth to their first son.
- Unnamed son - Mrs. Ackerman gave birth to Mr. Ackerman's first son.
- Yeager - Doctor Yeager is the Ackerman family's trusted doctor who was willing to make the trips to their home to check up on Mrs. Ackerman's pregnancy. Doctor Yeager helped the Ackerman family move to Shiganshina in order to better keep an eye on Mrs. Ackerman's pregnancy.