Brownies
Brownies are a race of Aos Sí (small folk) in Tír na nÓg. Small with mottled brown skin, you will most often find them working at household jobs.
In Mythology and Folklore:
"A brownie is a mythical creature often found in Scottish and English folklore. It is typically depicted as a small, house-dwelling, and benevolent spirit or fairy. Brownies are believed to help with household chores and tasks when they are not observed. They are known for their industriousness and helpfulness."From The Books:
The stranger wore a simple green dress with a white apron and a white kerchief on her head. Her skin was mottled in shades of brown, and her long ears came to sharp points at the tops. Her dark eyes glittered merrily as she watched me sit up in the bed. All in all, she was no taller than…a raccoon.***
He waved at a small woman, about as high as my knee. Her dark brown hair was tucked under a white kerchief that contrasted with her mottled brown skin, and she wore a neat blue linen dress with an apron.