Little is known about the rouge alien known as "Bubba" and there is no knowledge of its past to the members of the Hard Corps force, although there can be no denying of its effectiveness. It has the ability to communicate and comprehend in other languages; how is this possible is unknown.
"Bubba" has fought on behalf of the Terrans since before the Alien Wars. The nickname came from one of the Hard Corp's base computer geeks when he was scanning the known planetary sites for information about this enigmatic alien.
Among the Hard Corps, outside of the four members of the main strike team, there is some open distrust toward "Bubba". Some fear he might be a member of the alien mercenaries rumored to be under the new enemy's orders.
Bubba, alongside Ray, Tasha, and CD-288, was sent on a mission to stop Colonel Bassad. After making their way from a city into a hidden mountain fortress and subduing the colonel, the team was then absorbed into Bassad's brain as a last-ditch effort. Faced with several previously fought enemies, the four soldiers struggled to survive the onslaught of attacks in Bassad's degrading mind.
Overcoming the mind games, the team was inexplicably teleported onto a satellite planet which housed the last forces of the alien threat, and which was subsequently eliminated. The planet then exploded and the heroes were sent drifting in uncertainty on a broken piece of rock from the planet. Behind them, an arthropod alien was revealed to be hanging on the side of the rock.