Heavybomb is a gentle giant of a bot whose solemn and easy-going disposition are at odds with his powerful and fearsome appearance. Heavybomb modified and upgraded his demolition ballistics in conformance to military standards upon recruitment into the Autobot military. He is fiercely loyal to the Autobot cause, and a devoted follower of Primus. His altmode is a bulky, fortified demolition vehicle. Equipped with various types of demolition shells (including but not limited to mortar, anti-air missiles, and heavy munition explosive rounds), such powerful defense-penetrating weaponry comes with the price of an extremely slow and non-mobile alt-mode, low accuracy and firing rates, and poor ammo capacity. Once behind enemy-lines, he employs close-quarters combat techniques.