Cab is the crown prince of the Kingdom of Karin in the South Seas, but if he could have his way, he'd really rather not be. Cab has availed himself of the tropical nature of the Karin Islands to escape his responsibilities in the most extreme way possible, spending his days playing "wild boy" in the island jungle. Exposure to the evil of the Decepticons and a burgeoning friendship with Shūta Gō prompted Cab to join up with the Autobots and enter civilization, but like the saying goes: You can take the boy out of the jungle, but you can't take the jungle out of the boy. Brave to the point of stupidity, insufferably brash, and desperately caught up in a desire to appear mature while avoiding any of the actual responsibilities maturity entails, Cab doesn't tend to "play well" with others.

As an Autobot Headmaster Junior, Cab is bonded to a Transtector from the planet Master, which takes the form of a fire engine. Using his Master-Braces, he can summon a suit of armor that enhances his physical strength, speed and reflexes, which allows him to transform into a head for his Transtector and function as a full-size Transformer robot. Aside from these Transformer powers, Cab also possesses the remarkable ability to communicate with animals, and two of his best friends are an armadillo and a parrot that have accompanied him into the Western world. True to his self-imposed jungle upbringing, Cab is also quite an accomplished survivalist, able to build long-term shelters, cook using natural materials, and skilfully wield a knife. Both he and Shūta have a crush on their teammate Minerva.

(Source: TF Wiki)