A sadistic mnemosurgeon who used to work at the Institute. He's long-dead by the present, but his actions have had a lasting effect.
Remembrance Day reveals Overlord kidnapped Trepan to learn the secrets of mnemosurgery. Megatron eventually found out and had Trepan killed.

Sadist, mnemosurgeon, evil, autobot

Was scientist before The Great War, who's friend and colleague was Starscream.

Compassionate, smart, an Autobot

Pet, or formerly known as Dominus Ambus or Vos 1 or Agent 113, was an Autobot spy within the DJD, and is also the spark brother of Minimus Ambus. Before his identity was revealed and Dominus was subjected to the torture known as "domestication", he was a close friend of Kaon. In his "past life" he was Rewind's conjux endura. Also, because of lobotomy he can only talk like Earth dog.

Turbofox, Kaon's pet, lobotomized previous Vos

Hot Rod likes to take big unnecessary risks in an attempt to prove himself, which is why some of the older Autobots believe that he likes to "show off" too much. Bumblebee, on the other hand, enjoys participating in his reckless antics. Hot Rod also loves to race, however he hates to lose and will constantly demand revenge until he wins.

The next prime, loves to race

Just Tarn that y'all know very good. 

But, well, maybe, you are able to have some quality time from all this war things and you can just casually talk about music, tea, culture, Decepticon cause, Megatron... 

Stuck in the box with infamous DJD leader! 

Skywarp is kind and thoughtful geek, studious and considerate, and great at unknowingly getting 'KICK ME' signs stuck on his back. Loyal to his trinemates and Megatron.
Skywarp is one of the few Cybertronians who can boast of unusual abilities. More precisely, he can teleport 2.5 miles (4 km) away in the blink of an eye. 

🕯| Intruder in the blue times... 

Flywheels is a "twitchy neoprimalist with big feet" who suffers from a possibly made-up form of psychosomatic hyperflexia that causes him to change form when he lies.

Decepticon, who's praing to Primus?.. 

After DJD's attack, he was able to make it out alive, but lost his legs completely below the waist. 