Board Thread:Spoilers!/@comment-25345262-20150308171226/@comment-24674051-20150324142342

I think, again, that it all depends on the perspective that the writers are showing. For example, when Regina was transformed into Wilma, our perspective was still basically Regina's point of view. So we saw behind the spell, and we saw her slip up with Snow, blowing her disguise.

Ariel/Zelena with Hook in the Jolly Roger was from Hook's vantage point, Hook believed he was interfacing with Ariel, and based on what he did when he know Ariel in the EF, I did not find Zelena to be that far out of character for an emotionally hurt Ariel. And she only had to keep the ruse going one day tops, and kept her interactions to a bare minimum.

However, I agree that Zelena posing as Marian with Robin is going to be extremely tricky, since Robin knows Marian intimately, and unless Zelena has other tricks working for her, she is not going to be able to keep the illusion going for very long. Definitely not 6-8 weeks.