Primus is said to be the creator of all Cybertronians. He created the Thirteen Primes and later became one with the core of Cybertron. Unlike his brother Unicron, he represents light and life. He battled with Unicron for many ages and created Primes in order to defeat his brother. Primus is seen as something like a god to all Cybertronians and he was the one, who gave Optimus the Matrix of Leadership.