A Kobold is a Light Fae who deals in rare artifacts.
Bo and Dyson interrogate a Kobold named Heinze. Trick mentions that unless a Kobold is bound to you, you don't leave any of your stuff laying around. This implies Kobold are thieves. In addition, Bo admits to knowing that "Kobold are shifty".
The kobold is a sprite stemming from Germanic mythology and surviving into modern times in German folklore. Although usually invisible, a kobold can materialise in the form of an animal, fire, a human being, and a candle. The most common depictions of kobolds show them as humanlike figures the size of small children. Legends tell of three major types of kobolds. Most commonly, the creatures are house spirits of ambivalent nature; while they sometimes perform domestic chores, they play malicious tricks if insulted or neglected.