Etherious

Etherious (エーテリアス Ēteriasu) are a race of Demons that were born from the Books of Zeref.

Description
Etherious is the given name to the subspecies of the Demon Race that were created from the books made by the Dark Mage Zeref. Unlike the Demons that inhabit Galuna Island, not all Etherious possess wings and they do not all possess Human forms. Etherious utilizes Curses as opposed to Magic, though it is currently unknown if they are incapable of doing so or simply prefer not to.