Primus is the living creator-God of the Transformer race, whose body became the planet Cybertron. Primus is the twin brother of Unicron, his eternal foe, whom he battled for eons before going into stasis.
History[]
Transformers: Robots in Disguise[]
In the The Buzz on Windblade, Windblade mentions that Primus upgraded her form, placed her in stasis and ordered her to protect Earth from any threat.