Board Thread:General Discussion/@comment-24304025-20150121190259/@comment-24936039-20150210231441

People who came back from the dead (not just as animated corpses/zombies/ghosts):

1) Rumples 2) Daniel the Stable boy (via Frankenstein) 3) Victor's brother (via Frankenstein) 4) David Charming (via splitting and sharing Snow's heart) maybe... 5) Anastasia (Water from the Well of Wonders) 6) Amara (Cyrus's mother) (Water from the Well of Wonders)

Did I miss anyone else?

But in all the above cases, there was some sort of corpse to work with. Ingrid is basically dust now, but considering this is fiction, I'm sure the writers can contrive some sort of plot device to enable it if they feel that they need Ingrid (or any other character) back in more then just flashbacks.