The serigala that stopped Emma from leaving Storybrooke has not been diberikan an identity, but we have been diberikan clues enough to determine it. In a sneak peek for tonight's episode,Graham is often featured with one serigala as his companion. In another sneek peak,the Evil queen later reveals that he was raised oleh wolves. Since everyone in the fairy tale land was affected oleh the curse,even animals, I believe that the serigala that kept Emma from leaving is the same serigala that was Graham's ally and that possibly raised him.