A member of the Autobots with a strong sense of justice. While he is a capable warrior and a reliable comrade who commands respect, he is still a developing leader and feels the weight of his heavy responsibility. However, he rarely shows his inner weaknesses to others. Vehicle Mode: Trailer Truck. Weaponry: Ultra Axe.

The youngest warrior in Optimus's squad. Possessing a cheerful personality, he is an active Autobot who prefers running around to staying still. He is confident that no one can beat him when it comes to ground speed, and his teammates rely on him for high-speed combat. Vehicle Mode: Unmarked Police Car. Weaponry: Energy Stingers.

A member of the Autobots in Optimus's squad. He calls himself a weapons specialist, though he isn't always the most graceful with them. He boasts the greatest power in the squad and possesses a heavily armored, durable body. He has a friendly personality and believes that taking up arms is a necessary evil to stop the war with the Decepticons. Despite his rugged appearance, he is quite dexterous and is relied upon by everyone for mechanical tasks like setting up and maintaining Space Bridges. Vehicle Mode: Armored Truck. Weaponry: Wrecking Ball.

The medical officer responsible for all healthcare in Optimus's squad. A veteran Autobot who survived the Great War, the missing piece of his head crest is a remnant of those battles. Having seen many battlefields, he knows the harshness of war better than anyone, which often makes him grumpy and lecture-prone based on his past experiences. However, to the young ones like Bumblebee, he just seems like a nagging old bot. Vehicle Mode: Ambulance. Weaponry: Magnetic Manipulators, EMP Generator.

Though not an original member of the squad, he joined after meeting Optimus Prime and the others during a mission in space. While Prowl has a reticent and mysterious aura, he wasn't always this way. He attained high combat prowess and mental discipline through training under Master Yoketron, the teacher of the Cyber-Ninja arts on Cybertron. Vehicle Mode: Motorcycle. Weaponry: Razor Edge (Shuriken).

The leader of the Decepticons, an evil army that loves destruction and plots to monopolize the energy resources of the entire universe. Megatron's goal is to conquer the universe by exploiting the AllSpark, and he will stop at nothing to achieve it. He attacks the Autobots to steal the AllSpark they discovered. Vehicle Mode: Alien Jet. Weaponry: Fusion Cannon.

The second-in-command of the Decepticons. He possesses no sense of justice or compassion, pursuing only his own desires. An ambitious schemer, he constantly looks for an opening to betray and overthrow Megatron to take the leadership of the Decepticons for himself. Vehicle Mode: Jet. Weaponry: Dual Sonic Blasters.

A Decepticon soldier loyal to Megatron. He has three faces that shift when he speaks, corresponding to his triple personality. Icy (Calm): Blue face with a monocle. Speaks with a German accent and controls ice with cold precision. Hothead (Angry): Red face. Impatient and short-tempered, he controls fire. Random (Crazy): Jack-o'-lantern-style face. Unpredictable and prone to mindless rampages. Vehicle Mode: Tank, Jet. Weaponry: Dual Energy Cannons, Ice Missiles.

A Decepticon spy and the true identity of the high-ranking Autobot official, Longarm Prime. He reports the movements of the Autobot camp on Cybertron to Megatron. Shockwave has no personal ambition and acts solely out of loyalty to Megatron. He possesses not only a brilliant mind for strategy but also high combat capabilities. Vehicle Mode: Tank. Weaponry: Electromagnetic Spectrum.

A massive soldier with five eyes. His loyalty to Megatron is absolute, and he believes that Megatron's actions will lead to universal peace. While his intelligence is low, his combat ability is among the highest in the Decepticons. Vehicle Mode: Heavy Bomber. Weaponry: Atomic Mace