The robotic Mmrnmhrm.
The Mmrnmhrm were mechanical beings that were churned out of the huge Mother Ark about a millennium ago on some moon in the Virginis constellation. The origin and purpose of the Mother Ark which created the millions of sentient machines are unknown. Each Mmrnmhrm was created with an innate knowledge and purpose, though none have ever revealed what that purpose may be. Some human military commanders, including Commander Hayes, believe that the Mmrnmhrm were the first stage in a colonization effort by a distant, technologically proficient alien culture, which would follow and colonize the planets within the Mmrnmhrm sphere of influence.
In time the Mmrnmhrm met the Chenjesu and their co-operation and friendship became the foundation for the Alliance of Free Stars. The Spathi also mention that they had contact with the Mmrnmhrm prior to the Ur-Quan Slave War; the Mmrnmhrm tried to colonize Beta Hercullis, which is within the Spathi's sphere of influence, but they left the system without incident when the Spathi explained their claim to the system. After the Alliance lost to the Hierarchy in the War, the Mmrnmhrm, along with the Chenjesu, asked to be encased within a slave shield on Procyon II, the Chenjesu homeworld.
During the Ur-Quan Slave War the Mmrnmhrm flew their adaptable X-form starships.
The Mmrnmhrm are no more, having been synthesized with the Chenjesu to form a new hybrid race, the Chmmr, to fight against the Hierarchy. This was a logical solution for the Mmrnmhrm, as no more of their species could be made after the Mother Ark shut down.