Blitzwing

Blitzwing can be unstable. VERY unstable. He had three peronaliteys, one smart, one mad and one plain crazy. He was a Commander of the Decepticons on Cybertron.

He was one of the Decepticons who joined Darth Megatron on his exploration to the Galaxy which led to the discovery of the Sith and Jedi and Megatron becoming a Sith Lord. Blitzwing often cracked jokes and killed people, which for him was normal.

Soon, Darth Megatron was defeated and exiled by his right hand Shockwave who sent Starscream into exile too for good measure. Blitzwing retained his rank as Shockwave teamed up with Grand Admiral Thrawn and Supreme Leader Snoke.

Change of Heart
Blitzwing began to have doubts after the executions of the New Republic leaders following the Shadow Minds takeover of Coruscant. He later betrayed them and joined the Autobots. He was however killed in an attack on their base, during the Shadow Wars.