This is one of the 4 npcs at the NPC camp. which is to your right as you leave the canyon and travels a short bit. These four npcs work together and call themselves the Fabulous Four. They will kill any monster that wanders near their camp and chase it until it is dead then wander back. They are aggressive to dark races ( troll, ogre, dark elf ) and also to necromancers of any race, but other 'good' combinations can safely sit down at their camp and rest/med. Hailing these NPC's is humorous. They are benevolent and will offer heal you if you ask the High Elf Paladin. When you ask the Paladin he actually says he has to conserve his mana, but they will escort people from the cauldron apparently. I haven't tried to see how this works, but I assume they walk up to the canyon to Butcher Block as I have seen them up there many times stuck against the canyon walls as they try to get back. I always assumed that people trained them up there but maybe they were escorted.
This particular guy is the Wood Elf ranger.
From a comment by: Lionkin