Mingus

Mingus exists approximately 1000+ years into the future Ooo and is supposedly "built" by Marceline (or as she is later known: "The Empress") from BMO's recycled parts. He and his brothers (Bartholomew and Orange Juice) have been tasked with retrieving found artifacts to the Empress as part of their allegiance to her.

Appearance
Mingus is approximately 1 2/3 the size of Finn (based on the comic book artwork) and is the shortest out of his siblings. He has a hemispherical rigid metallic body and has mechanical arms and legs. He also has two white glowing eyes.