Physically there is no difference between an Emm’Kevirda goblin and a Bela’Wani goblin. They are both a little over 3 feet tall and little over 40 pounds, have the same skin color variations (which seems to have no regard for generativity), the same eye color variations, and the same hair color variations. What differs in their appearance is, where Bela’Wani (males) are completely unwashed, filthy, disgusting smelling, wretches, Emm’Kevirda are unwashed (unless you include dog tongues), animal smelling, savages.
Many goblin communities include large packs of worgs that share in their food and in the defense of the community. This is possible because of the Emm’Kevirda. Emm’Kevirda have a penchant for worgs that borders on zoophilia, sometimes crossing that line, and always just a little eccentric. Outside of their love for worgs, Emm’Kevirda have little use for the rest of goblin society. Emm’Kevirda make up about 5% of the population of a warren.