The Deer Women show characteristics and traits of both sirens and succubi. The siren, according to the Theoi Project, are monstrous sea nymphs that lure men to their deaths with their song. Succubi, as defined by the Merriam-Webster dictionary, are "demons who take female form who have sexual intercourse with men in their sleep"; constant contact with a succubus can result in failing health or death for the man. Deer woman lure men with their beauty and magic, like the sirens, and then sleep with and kill men like succubi. Countless female spirits world wide have similar characteristics.