You see an adventurer.
Notes
Using a Guardcatcher on it has a chance of turning it into an Angry Adventurer. Part of the Goblin Merchant Quest.
Abilities
None.
Damage Taken From Elements
Physical 
Death 
Holy 
Ice 
Fire
Energy
Earth
Drown
Location
Venore swamp.
Behaviour
Will not harm anyone and walks at a snail's pace.
An adventurer attacks in melee range. An adventurer will retreat at 65 (100%, full) health.
Strategy
You can just kill them, they won't attack you. Or you could leave them be.