Board Thread:Spoilers!/@comment-1916997-20160130171349/@comment-27060727-20160401223513

Personally, the only people I can see leaving the main cast are Robert, Emilie, and Bex. If Bex left, it would be a plot choice by the writers, not because Bex wanted to leave because she clearly loves the show. I thought Zelena would've been killed off by now, but I guess they're redeeming her after all. My "most likely to leave" actor would be Robert, because Rumple is the only one that I can see getting killed off permanently by the end of the series and I feel pretty strongly about that prediction. Judging by 5x23 bts, it doesn't look like Rumple is in any danger this arc, so Robert will be back. Belle is pretty underused and is the least connected to all of the other main characters, so if contracts are up and Emilie decided that she didn't want to come back for season 6, I honestly don't think it'd be a huge loss to the show. She's just a pawn in Rumple's story and he's still a villain with her there. She's not even seen with him in these last couple of 5B episodes, so if Belle has run off somewhere, they could literally leave her story there if they wanted and maybe do a check-in on her before the show ends. (However, Emilie did tweet that she was excited to return for S6, so it doesn't seem like Belle's going anywhere)

I've never entertained the thought of Sean leaving the show or Robin getting written out though. We shall see how that goes pretty soon.