The 狼, オオカミ that stopped Emma from leaving Storybrooke has not been 与えられた an identity, but we have been 与えられた clues enough to determine it. In a sneak peek for tonight's episode,Graham is often featured with one 狼, オオカミ as his companion. In another sneek peak,the Evil クイーン later reveals that he was raised によって wolves. Since everyone in the fairy tale land was affected によって the curse,even animals, I believe that the 狼, オオカミ that kept Emma from leaving is the same 狼, オオカミ that was Graham's ally and that possibly raised him.