User blog comment:Miskos3/Fairy Tail Episde 225: The Lightning Man, Review/@comment-112.203.229.53-20150323064914/@comment-84.151.145.200-20150325135101

Perhaps they're representation of 7 kin of purgatory.

Person                        Repr. (X784)

Priest                        Hades Tanned woman                  Ultear One Eye Demon                 Azuma Blond man                     Zancrow Pink-haired woman             Meredy Gray                          Caprico(rn)/Zoldeo Small guy                     Kain Hikaru Monk                          Zancrow

Theory: They can be persons from Rustyrose's fantasy-embodyment and Kain Hikaru's voodoo doll is given to the small guy.

or

They're a normal dark guild than others.