Board Thread:Spoilers!/@comment-27060727-20160808004056/@comment-24674051-20161011183248

Actually, if they are going the way that it appears they are, we the audience may well know who Shirin/Jasmine is. But Snow and company (except probably Rumple) would have no clue. None of the characters is aware of the Aladdin connection. Even Emma is not aware that Aladdin is the former Savior, she only knows that she's not the first. So they would not be looking for Jasmine to show up, and since many of the characters are aware of Agrabah, finding a resident from Agrabah included in the DC would not be a huge surprise.

I think all that the characters will know is that Shirin is one of many as yet unmentioned SB residents from the original Dark Curse (and you know there are many more of these people around). I think it is possible that Jasmine is choosing to keep her identity to herself at the beginning of the episode, but will come out and reveal herself either at the end of the episode, or during the next one. So, just like we as the audience knew that Mary Margaret was actuall Snow in season 1, We as the audience will know that Shirin is Jasmine in Season 6. The fun will be in how that piece of information is revealed to the other characters.