Goblin
Goblins are a species of Others that typically dwell on the outskirts of cities, they are vicious bastards that enjoy the pain and misery of others, often attacking those who fall through the cracks or homeless. They are violent and have names that are inappropriate and crass, making them frustrating to work with. Those who utilize them exclusively are Goblin Queens or Goblin Kings.
Goblins typically don't get along with Faeries and it has been revealed that some time in the past they were actually enslaved and bound by them, during an era when the courts were changing over. As a result it mixed up relationship between the two and many powerful goblins agreed to take up certain forms, as part of treaties.
Types
Goblins come in many shapes and sizes, male and female, but generally speaking they are brutes who rely on physical strength and brute force. They are weak to power-infused water, which makes cities hard for them to thrive in because metal pipes beneath the ground carry a charge.
Gremlins, a subspecies of goblin, are tinkerers and trap-makers who take technology and tools and use them to kill their prey.
Uses
Goblins are basically attack dogs, rabid in nature and used for destructive purposes rather than anything else because they are so difficult to control. Some have abilities that make them more useful.