De'Vyu Headhunter is a Notorious Monster in Final Fantasy XI. He a target of the quest "Mysteries of Beadeaux I", for which the player must acquire a Quadav Charm from him. The Quadav Charm is exchanged for a Coruscant rosary, which is in turn required for Bastok Mission 4-1: Magicite, San d'Oria Mission 4-1: Magicite, and Windurst Mission 4-1: Magicite.