Null Guardian

Null Guardians are artificial creatures native to the Null Void.

Appearance
Null Guardians are gray creatures with no eyes, legs or arms, and bat-like wings and tentacles that are used as limbs.

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

Behavior
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.