Bumblebee is one of Optimus Prime's most trusted lieutenants. Although he's not the strongest or most powerful of the Autobots, Bumblebee more than makes up for it with his determination and bravery. He would gladly give his life to protect others and stop the Decepticons.
Badly damaged in battle, Bumblebee lost the ability to speak verbally, though he can still communicate over inter-Autobot frequencies or by playing audio clips from popular media on his radio.