Sloane is a Fortu much like any of the other created during the era of the Five, however, there is suspicion that Sloane was more influenced by Rhysmaeon than any of the other Fortu.  Sloane was one of the Fortu that accompanied Rhysmaeon when Nureyev disappeared and the Linking Ward isolated with only Rhysmaeon in it.  Sloane is also under suspicion because he is often openly hostile to Sigmund, never betraying him, but often challenging him as if he blamed Sigmund for something terrible (liking killing Rhysmaeon, which Sigmund was a party to)