They will be vendors that you can find in the caves. They are non-hostile but that doesn't mean they are on your side, it's just business. To benefit of their services you will have to help them directly or indirectly in some way.
Now the challenge is to give them enough complex behavior to make them interesting.
Saw your announcement yesterday, I really love the idea of a pantless hero and the visual realization. Your gobelin, like your other art, looks really cool !
What is the story behind calling this vendor gobelin instead of goblin (Or is it just a typo?) I'm interested, because my game is called Gnoblins and many people just saw it as weak approach to rename the standard goblin. Eventually there is a reason we call them gnoblins and by the way, real goblins are although included in the game.