Jakob is the older brother of Gideon who together run the weapon shop in the Junk Heap. He is responsible and dearly loves his mother and brother.
Their mother willing abandoned them, having grown tired of the responsibility of raising children and sought to run off with a lover and start over. However the Junk Heap’s security system killed her and her lover before they made it out. Jakob admits that he knew what their mother had done when she didn’t return but couldn’t tell Gideon.
While searching the Junk Heap Gideon would have been crushed by a collapse caused by a robot called P-33 had Jakob not pushed him out of the way and been killed instead. Having grown dependant Jakob after their mother’s death Gideon broke down and while trying to free Jakob from the debris accidentally ripped Jakob’s arm off, an event that traumatized Gideon the point where he inflicted injuries to his own arm and eventually required an artificial left arm.
It is later revealed that the collapse was caused by Gideon’s loud yelling and not P-33 and it’s shade friend Kalil who expressed sorrow and claimed they thought the boys were kind.