| 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. Arlert was the father of Armin Arlert.
Mr. Arlert appeared to be a very courageous man, willing to risk his own life in order to escape beyond the Walls. The fact that he was able to design a hot air balloon that would carry him and his wife beyond the Walls indicates that he was a remarkably intelligent man.
- Mr. Arlert's design was debuted in the Attack on Titan Character Encyclopedia.
- Mr. Arlert shares a birthday with Franz Kefka.