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