Board Thread:General Discussion/@comment-3440938-20180420211125/@comment-34069951-20180512032841

The Evil Queen from Snow White is never shown to die, she just falls down a cliff - her fate is never made clear (although strongly implied)

Hades cannot die as he is immortal (and arguably the same for Fiona if you take her as a Fairy as per the original novel in which she cannot technically die).