Quintessa

''"You traitor! You had the chance to restore your home... and you chose defiance!" ''—Quintessa to Shockdrop

The mysterious space sorceress known as Quintessa is the self-proclaimed "Prime of Life," and apparently claims to have created the Cybertronian species. She believes that Cybertron is hers to command. Her past is almost as mysterious as that of the Dimensional Guardians, but her power may very well surpass theirs.

She once commanded the Guardian Knights before they "betrayed" her and stole her Staff (which later became the Wizard Merlin's). The Knights refer to Quintessa as "The Great Deceiver," so how much of what she says is actually true may be up for debate. What does appear to be true about Quintessa is that she's a ruthless, genocidal psychopath with massive delusions of grandeur—an overall "charming" personality that, quite frankly, makes her more endearing to the tyrannical Megatron than to the noble Optimus Prime. She commands a small group of Transformers known as the Infernocons.

She is one of the major antagonists in the Robot Defenders continuity, the others being Megatron, Starscream and Unicron.

History
The true origins and motives of the being known as Quintessa are unknown. She professed to be the creator and goddess of Cybertron, but in the distant past, her twelve guardian knights came to understand that she was not as benevolent as she appeared, and so stole her powerful staff and hid it on Earth.

In the present day, Quintessa sought to repair the shattered Cybertron—ravaged by the Autobot/Decepticon war. Remaining unseen, Quintessa was able to follow the conflict between the Autobot forces and Moltenstorm's Predacons on Earth. Through doing so, Quintessa learned of the latter's plans to resurrect Cybertron's ancient enemy, Unicron. While the Autobots started their attack on Moltenstorm's forces, Quintessa revealed herself to Jaegertron, reformatting him into "Galvatron" and sending him on a mission to hack Moltenstorm's data network. The brainwashed Galvatron would quickly revert to Jaegertron, though this didn't concern Quintessa, who had forged an alliance with the Decepticon Leader, Megatron, to locate her staff on Earth.