Siren
The form of the siren is greatly disputed. Some say they are beautiful women, others say they are ghosts of beautiful women, some say they are birds with the heads and bodies of women, and still others say they resemble mermaids. Whatever their form, sirens enchant people with their beautiful songs. Some people claim they used these songs to attract ships to the sharp rocks of the shore, and others claim they are simply singing for pleasure, though it is more widely accepted that sirens have tainted intentions.
Sirens may be summoned to aid with singing, or with love spells. They can grow dangerous, so use cation. As always, never summon anything you can't banish.