Josef is an older man with gray hair, blue or green eyes, and a beard, appearing to be of a senior age. He lives in a desert area where he serves as a caretaker for a terminally ill young man named Will. Will is desperately trying to build a working airplane to leave his mark on the world before he dies, and Josef supports him in this endeavor.

Josef possesses a surprising and extensive knowledge of cybernetics. This expertise becomes crucial to the story when he takes in the android Solty after she becomes separated from her partner, Roy Revant. He not only provides her with shelter but also plays a key role in helping her recover her lost memories and unlock her full range of abilities. Josef is the one who understands the significance of the name Dike, which is connected to Solty's true origin. His actions are instrumental in restoring Solty to her full power, allowing her to confront major threats later in the narrative.

Despite being a new addition to the main group, Josef is described as a grizzled old man archetype who quickly becomes an active and valued member of the team. He joins the central characters in their efforts to stop the schemes of the primary antagonist, Ashley Lynx. During the final confrontations, Josef participates in the action by helping to take down rampaging Resembled humans, working alongside characters like Miranda and Kasha.