| 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.
Grandfather Arlelt is Armin Arlelt's grandfather.
Grandfather Arlelt is an older man with a rather youthful face, yet very aged hands and body. He has light brown eyes and shaggy, graying brown hair with a beard and mustache that does not connect around his mouth. He is only ever seen wearing a tattered light brown hat, a faded beige sweater with a brown shirt over it and a green scarf.