The Commando

The survivor you start with, he's a jack of all trades but a master of none

Mul-T

A tanky robot that can either fire very quickly for small damage, or charge up for large hits

The Huntress

A frail but mobile archer whom's attack will home in automatically

The Engineer

Sets up turrets that gain copies of his items

The Artificer

A mage like character that uses the elements at their disposal

The Mercenary

A quick and nimble melee fighter