You control two top mercenaries in the adventuring business: Caddoc, the human warrior, and E'lara, the elf archer. Both are killing machines on their own, but together they are a whirlwind of destruction.
Caddoc
Caddoc is a deadly warrior, but he considers his mind to be one of his sharpest weapons. He is cool and cautious, always thinking tactically. He prefers to analyze a situation and develop a plan before charging in, which makes him a perfect counterpoint to the impulsive E'lara. When Caddoc was a youth, an impulsive action brought tragedy; as a result, he vowed never to make such a mistake again.
Even though Caddoc owns a crossbow, you're generally much better served heading into melee combat with him. His weapon upgrades all come from melee weapons, such as axes and swords, and his magic centers around close combat. Caddoc also taps into Fury, so he builds untapped energy as he chains attacks in combat. When that energy is full, he can release it in a single, powerful attack.
E'lara
E'lara loves a good fight and thrives on adrenaline. Rash and impulsive, she never hesitates to act, which can get her into sticky situations when caution is called for. Her brash exterior covers a traumatic past that she keeps deeply buried. She never thinks of her past, nor stops to consider her future. She lives entirely for the thrill of the moment.
While out adventuring, you'll definitely want to hang back and shoot targets with E'lara's bow. Seek cover whenever possible—and not just to stay protected; E'lara fires more accurate shots from behind cover. When enemies get in close, you may have to switch to her melee weapon. Hack away to stay alive, then get back out into bow range to maximize your combat effectiveness.
Teaming Up
Working together will keep you alive longer than going it solo. Whether you're playing co-op or working with a computer-controlled partner, concentrating on enemies to drop their life totals faster is the way to go. Particularly if you're playing E'lara, you can survey the battlefield from cover and make sure your arrows support Caddoc and either pin down enemy ranged attackers or finish off enemies wounded by the warrior. While collecting loot, spread things out evenly, and remember that whichever character hits a weapon rack gets an item specifically for their class. If one character already has an epic weapon, you might want to let the other character open weapon racks until he or she gets one too.