The females of this species of Highland Scots fairy have long fair hair and travel from village to village by water, helping to tend cattle. Because of their mode of transport, the gruagach tends to arrive at the farm door drenched, asking to dry herself by the fire. If she is admitted, she will be lucky around the house and serve the family well.
The males help with farmwork, and wear jerkins of bright red and green leather.
Rather like Brownies, they will happily serve their masters for nothing more than a cup of milk.