Grandfather Arlert

"Poor kids, you can tell by looking at them it must have been terrible."

- Mr. Arlert to Armin after seeing Mikasa and Eren.

Appearance
Mr. Arlert was an older man with a rather youthful face yet very aged hands and body. He had light brown eyes and shaggy brown hair with a beard and moustache that did not connect around his mouth. He was only ever seen wearing a tattered light brown hat, a faded beige sweater with a brown shirt over it and a green scarf, short grey pants, and shoes.

Personality
Mr. Arlert appeared to be a humble man, taking in his grandson when he was orphaned. He spoke with a calm tone and pitted Eren Yeager and Mikasa Ackerman after seeing their horrified expressions, stating that whatever they had seen must have been terrible. Mr. Arlert cared for Armin and his friends, convincing the soldiers distributing food in Wall Rose to give him extra for the children.

Fall of Shiganshina arc
In the year 845, he had been taking care of Armin until the Colossal Titan's first appearance in Shiganshina District. During this time, he and his grandson were able to board a boat and escape to Wall Rose. He continued to look after Armin and his friends, getting them food and working alongside them. He stayed as a refugee in Wall Rose for a year working the fields for food, until the central government began a retrieval operation in 846 in order to take back Wall Maria. He was summoned to be a part of this mission along with two hundred fifty thousand other people, of which only a little over one hundred survived, himself not among them. He and the other that had died to the Titans were recognized silently by the people for their help in alleviating the food shortage for the rest of the Wall Maria refugees. Before his leave, he gave his grandson Armin the hat he had always worn. After hearing word of his grandfather's death, Armin is seen crying as he holds his hat in his hands. As his friend Eren Yeager tells him and Mikasa Ackerman that he plans to join the Military. Armin then bravely states that he is joining too, clearly upset at the government pushing his grandfather to his death. Their friend Mikasa states that she too will join and the three go into training together the following year in 847.

104th Trainees Squad arc
During his intimidation, or "rite of passage", from Keith Shadis, Armin states him name and is insulted by the instructor for it. When Shadis asks him if his parents gave him the name Armin replies that it was given to him by his grandfather.

Battle of Trost District arc
When Dot Pixis is giving his orders to the Garrison and Trainee soldiers to retake Trost District, he mentions the central government's attempt to retake Wall Maria four years ago. When speaking about it he directly says that it was no more than their way of dealing with being unable to feed the refugees and that by sending them outside of the Walls, they were able to survive within them. He states that all of humanity bears the weight of that sin as Armin listens in the crowd, remembering his tears and last moments with his grandfather.