Ironhide

"Go chew on a microchip," is Ironhide's slogan. Prefers action to words. Oldest, toughest, most battle-tested Autobot. Bodyguard to Optimus Prime. In charge of guarding anything of importance. Gruff but kind. Trithyllium-steel skin makes him nearly invulnerable to attack. Shoots variety of liquids from supercooled nitrogen to superheated lead. Has sonar, radar, radiowave detector. Slowest and most fragile of the group.