Arcee

Arcee is a member of the Autobots (the good guys in general). Like every cybertronians, shes a robotic alien entity and have the ability to transform into any metal, robotic and vehicles, and in this situation, a motorbike or a sports car, but cant do it now due to the shrinkage

Arcee was originally much bigger than a human, but she was shot by a mysterious laser and now shes only one seventy something, still she has her metal skin on and can still uses weapons. Because she isnt entirely robotic, she also has organs

Arcee is known to be the very few female cybertronians. Shes not as strong as her teammates such as Bumblebee or Magnus, but her agility and lightness makes her a powerful combatant. Shes also very brave. Some says she has no visible weaknesses, telling how great a soldier she is. Even being a warrior, she has a nice side and feels comfortable with humans

All cybertronians runs on something called the allspark, it's their source of energy.

There is a war between two sides of people the Autobots and the Decepticons. Because of that Cybertron, the home planet of them is basically dead, and the war moves towards Earth, where Autobots seeks refuge and protects the humans and Decepticons is leading an invasion. Today thankfully, the Decepticons are still planning things and it seems like days could be peaceful for a while