Actually, Ertan's name is Andy, and he's trying desperately to appear tougher than he is. He wants to be a badass mercenary, and he's got the skills, but he's a bit green and tries too hard to be mean. He thinks killing is "rad." He is also obsessed with the dark lord, and will frequently mention this.
This character has other interactions.
Ertan appears at Santa Fe Springs after several Ranger deployments (After the first radio tower is activated).
If Ertan is in the player's squad when they meet Adrian Gordon, a scene may play where he immediately guns down Gordon.