Grogroch: These fairies are said to possess the power of invisibility and will only finally reveal themselves once they know you're trustworthy. Once they do it's time to kick up your feet and let them take over some of your household chores. They'll scurry around completing some of your dirty work and they'll do all of this for the simple payment of a jug of cream.

"In spite of their stupidity, the grogroch were extremely good hearted and eager to do good turns. Indeed, they were so eager to please that they invariably became pests about the house. They would run about (often invisibly) trying to do small chores for the woman of the house, and would usually end up creating more mess than they cleared."

This breed appears to include only males, as no female ones have been observed. They don't wear clothes, but they sport a variety of twigs and other grime they've accumulated on their travels; they are known for their lack of personal hygiene.

The grogoch is not afraid of the most extreme temperatures and is satisfied with little as home; a cave, a hole or any defect works very well.