While waiting for the 4th film to arrives, here is a concept art of the female autobot Override
While most fans know Override from Transformers Cybertron, this concept of the female autobot shows that she transforms into a red Dodge Caliber SUV and has metallic hair to accurately confirm that she is definately a girl. From Transformers Revenge of the Fallen, female autobots Arcee, Chromia and Elita One didn't have any metallic hair. However in Dark of the Moon, Sentinel Prime has a metallic beard and the Dreads have dreadlock like hair to make them look like thugs. Those looks were just the begining of designing certain autobot and decepticon characters for the films.
Now if Bay does accept this concept art of the female autobot for Transformers 4, Override should serve as Optimus Prime's new second in command and with the fourth film being a serious sequel, the best person that most consider him to cast as this character is the voice of Janet van Dyne/The Wasp from Avengers Earth's Mightiest Heroes
Colleen O'Shaughnessey
Colleen O'Shaughnessey is most known in LA for voicing characters in many different animated shows that are responsible for other people's actions as well as their own like Jazz Fenton from Danny Phantom. She would serve well as a very well suited voice for the character.
In the mean time stay tuned for more furture updates.