The Aroulo Beast Slayers are T2 Noble Infantry of the Aroulo, doubling as Elite Foraging Specialist Troops. They can be found in parties with the Aroulo troop template.
These strong ones choose instead to slay the beasts of Aroulo instead of taming them like their comrades. This makes them rather tough and skilled, on par in tenacity with the dwarves. They use rather dangerous two-handed tribal hammers that can easily crush trough troops, but fortunately lack armour and shields, making them vulnerable to archers.