I'm about to plant daisies in my front yard, to discourage malevolent fairies.
There's also Will o' the Whisp, who misleads travellers. My father, who visited Ireland twice, and was a wonderful story teller used to tell us tales of Will O'The Whisp in Ireland.
I was quite young when mother read me James Stephens' "The Crock of Gold", where Pan comes to Ireland.
Ingenuos, I told the tale to a psychiatrist, leaving out an important detail, that it was a book.
The psychiatrist decided I was describing my homelife and was probably schizophrenic.
Ridiculous, of course! Dad was quite strict about allowing Leprechauns into the house, except to fix our shoes of course. While Pan did come for coffee now and then, he never danced.
The Leanan Sidhe is a sort of Irish Muse, she inspires poets while she drains the life out of them. Writing will do that to you.