No mere kobold would stick his neck out far enough to be an anti-hero, but a winged kobold might.
-4 Str, +2 Dex
30’ fly 30’
Sunlight Sensitivity: in direct sunlight or bright light, disadvantage on attack rolls and Wisdom (Perception) rolls that depend on sight.
Pack Tactics: advantage on any attack roll against an opponent when an ally is within 5 feet (negates disadvantage above).
Bonus attack: dropped rock. 1d6 base damage to a creature directly below the winged kobold.
MM 195, plus:
Recidivism: the kobolds are a constant nuisance in the Rehabilitation Camps. Their large numbers and single-mindedness lead to a constant profusion of traps and tunnel systems leading into and out of the Camps. As a result, there has been significant kobold loss over the generations, though when a new colony is found, they are defeated and captured and returned to the Camps with minimal casualties.