It supposed to be a spirit of a saint.. (or something like that) but some considered a god.. and you the elements use to summon it is water and fire I believe.. *_* but better not do it.. if you do not know much about it..
High priestess Doris is an angel. It is normal in the voodoo religion to summon spirits to help your spell become stronger and more effective . Gjoub is a beautiful, friendly, and undeniably powerful spirit. After meeting them, i am a strong believer in voodoo religion. People shouldnt talk bad about something they have no knowledge of. It is nothing remotely related to bad.