The far darrig or fear dearg is a near relation to the leprechaun, with similar features and a short stocky body. His face is splotched yellow. He dresses in red from his hat to his tail-trailing cape to the woolen stockings which cling to his calves. This is the reason he is called the far darrig or red man.

He is known not only for his color but for his delight in mischief and mockery. He can be a gruesome practical joker. He manipulates his voice, emitting sounds like the thudding waves on the rocks or the cooing of pigeons. His favorite is the dull, hollow laugh of a dead man; which he makes sound as if it's coming from the grave. He has also been known to give evil dreams.

With all his pranks, the far darrig desires not to do harm but to show favor. He actually is good natured and will bring luck to those whom he approves; but he cannot resist a preliminary teasing.