Quintessons

Early Years
The Quintessons lived on a planet called Earth Q. They were created by the Cybertronian Quintessa. Quintessa and her master Quintus Prime together created the Quintessons as a fail-safe if the Cybertronians died out.

On Planet Q, Quintus and Quintessa made sure the Quintessons got a society that worked. But Quintessa soon took command and killed her master. She then led the Quintessons to a better place. The Quintessons started using Cybertronians as slaves.

Years passed by until the Thirteen Primes went against Quintessa. She used the Quintus Staff and fought back, but was later defeated by the Primes.

This forced the Quintessons to leave Planet Q as it had been destroyed by the Primes. Getting to a moon nearby, the Quintessons rebuilt and became an enemy of the Cybertronians.

Quintesson War
The Quintessons later went to battle against the Cybertronains. They had created an army of Sharkticons and their commander Scorponok. The large war destroyed parts of Cybertron. It wasn't until Zeta Prime actually took his whole army to the "broken city" they were able to defeat the Quintessons. They were nearly extinct. Only one survived and left with Scorponok.

Alpha Q
The Quintesson who survived became Alpha Quintesson also known as Alpha Q. He swore to destroy Cybertron as he started to rebuild the Sharkticon army.