Fallen

Megatronus Prime (メガトロナス・プライム, Megatoronasu Puraimu) was one of the founding members of the Dynasty of Primes. Rightfully proud of his power and unwaveringly loyal to his kind, Megatronus Prime though of himself as a warrior first and foremost. At the same time, his dark powers and conflicted nature meant that he was rarely at peace with himself. His artifact of power—the deadly Requiem Blaster—used stellar fusion as an energy conduit, exponentially increasing his already destructive powers. Viewing himself as an outsider, he even frequently been butted heads with the warrior of light Maximus Prime, to the point where even his closest allies among the other Primes viewed him as an unpredictable and unstable presence. Not even a close friendship/romance with Solus Prime and her comforting presence, that he and Maximus shared, could rein in Megatronus' chaotic tendencies; his private insecurities and hidden fears continued to fester, and soon gave way to something darker.

Megatronus's unchecked temper would soon have dire repercussions for the rest of the Primes. In a fit of jealousy and rage, Megatronus Prime finally turned on his former allies, declared war on his brethren, and changed his name as the Fallen (フォーレン, Fōren), the founder of the original Decepticons, and the master of his apprentice Megatron.

"Prepare to die, along with the rest of your- AAHH!" "They were your brothers, too!"
 * —Fallen and Optimus Prime.

Appearance & Biography

 * Voice Actor: Gil Gerard (English), Not Known (Japanese), Not Known (German), Not Known (Italian), Not Known (Arabic), Not Known (Latin American Spanish)

Vehicle Mode
He transforms into both a Cybertronian Tank, he has known Earth-based vehicle mode.

Friends/Allies

 * Ancient Decepticons
 * Solus Prime (love interest)

Rivals

 * Maximus Prime

Enemies

 * Ancient Autobots
 * Dynasty of Primes
 * Onyx Prime
 * Nexus Prime

Past
In the distant past, Megatronus accompanied his brother Primes to their intergalactic travels. Just as arriving to Earth, however, they had discovered a primitive race of hunters. The Primes invoked their rule of the sanctity of life and refused to activate the harvester, but The Fallen despised the humans as simple insects and was ignored and denied to activating the Star Harvester and the pursuits of the AllSpark.

Upon returning back to Cybertron, the rivalry between Maximus Prime and himself escalated when they subsequently fell in love with Solus Prime. Their bids for her affection turned their rivalry into hatred and Megatronus insulted Maximus in front of Solus, and in response was attacked by Maximus. This brief fight ended in victory for Maximus, while jealous Megatronus left his brethren behind and wandered alone.

During this time, Megatronus assembled his own Cybertronian followers into an army he would name as "Decepticons", and donned the moniker name 'The Fallen'. A beginning the first war and a great battle would took place on Cybertron and vowing vengeance against those ever denied and betrayed him.

Ultimately, The Fallen was defeated and was eventually imprisoned in another dimension by the remaining Primes, and held both Earth and Cybertron responsible for his defeat. The Fallen became known as the first Decepticon, and he became the master of Megatron, leader of the rebuilted faction.

He maintained a degree of agency over the events in this world, and he was able to influence events so that the Ark and the Nemesis crash-landed on Earth, along with prison ship Alchemor that would release its cargo of Decepticon convicts ever captured across the galaxy in the process. From there, The Fallen bided his time.