Mirage

Mirage is a rebellious Autobot, constantly disobeying Optimus Prime's orders, like revealing himself to a human when Optimus states not to. Mirage is also very immature, constantly making jokes and not thinking about the consequences when he makes decisions. However, despite his flaws, he's still a noble Autobot, sacrificing himself to protect his human friend. (From Transformers Rise of The Beasts)