Primus (Transformers)

Primus is a robotic organism from the Transformers universe.

Physiology
Primus is the planet Cybertron.

History
Primus may well be the first and most powerfull Transformer ever (along side Unicron) being refered to by most Transformers as the Protector or God of Light, as aposed to Unicron who is often called the God of Darkness or the Destroyer of Cybertron.

Primus rarely enters his robot/Humanoid form, when he does it is often a case of great Galactic termoil and unrest. One such example was when a rapidly expanding black hole or vortex threatend to not only destroy Cybertron but the entire galaxy, however Primus was able to stop it.