Titan

About
A Titan is a massive creature, however, most Titans take on forms of other creatures, for instance, the crab, where the Titan which gave the class it's name was first discovered to be an evolved human. Titans were created when a Human evolution occurred on Hargen, the planet humans originate from, and took a step up from human size to an extremely tall giant. Imagine a Titan as being a human that is 5 times as big.