User blog comment:SayuriDarling/The House of Hades Official Discussion/@comment-4649443-20131015105346

I think Calypso's curse may already be broken/breaking. Here are the reasons:

1)First of all, I noticed that all of the people who met Calypso already had someone. Odysseus had Penelope. Francis had Queen Elizabeth(?) and Percy had Annabeth (and maybe even Rachel, at that time...). But Leo doesn't have anyone.

2)It seems that Leo is the only one who said anything about going back.

3)Leo is the only one Calypso actually forced to go back.

Do any of these mean anything?

And while we're on this subject, I'll put my theories about how the "oath to keep with a final breath" could refer to Leo's oath.

1)Leo dies(just to add another theory, maybe he does something that saves Frank's life at the cost of his). And Calypso fades off. I'm not sure how Rick would pull this off, but maybe they end up going to the same afterlife.

2)Leo "dies" but--like Hercules--gets transformed into a god at his final moments. So maybe they meant his final mortal breath. Also, I don't remember anyone ever mentioning that gods breathe, so....