Null Guardian

Null Guardians, also known as Nullvoiders, are artificial creatures native to the Null Void.

Biology
Null Guardians are gray creatures resembling Vulpimancers but with bat-like wings and tentacles instead of traditional limbs.

Cultural significance
Because of their function, Null Guardians are considered to be prison guards or "guardian angels" by colonists in the Null Void, and are shown to be easily tamed and used as mounts.

History
Galvans created the Null Void as a prison for intergalactic criminals. Thus, they created the Null Guardians to protect the colonists there from criminals.