Jonas

A repair bot that shies away from violence. His sole purpose is to keep the ship afloat. He has amazing repair skills and knows all the good little nooks and crannies on the ship to hide in.

As a part of the ship, Jonas as well has heavily damaged memory banks. Probably somewhere in the dark recesses of his mind are some very useful tidbits of information.

Certain Death
Throughout much of the events depicted in Certain Death, Jonas teetered erratically between functioning well and accomplishing things (e.g. capturing 9,000 Condemned soldiers inside airlocks, repairing the heating in a freezing segment of the ship) and just bonking off and doing dumb stuff for the sake of doing dumb stuff (e.g. stealing a 7 layer dip belonging to Archibald Jeeeves, or booby trapping the room belonging to Wirt Minnow).

All in all, mostly harmless.

Jeves' School
About a generation after the events of Certain Death, Jonas was employed to serve on the island housing Jeves' School, alongside a Morty and a massive, unnamed man. All three were stationed at a long rope bridge outside the school. All three died when Grouchy Bob ran past them and cut the ropes of the bridge before they could reach land.

Aftermath
Another generation or two later, after the residents became the Conglomerate civilization, Jonas' body was recovered from the ravine he fell into, and then torn apart to be repurposed as cyborg parts for PG Copper, who was then sent on a mission of exploration throughout time.