User blog comment:SayuriDarling/The House of Hades Official Discussion/@comment-3146930-20131011044335/@comment-3146930-20131011110014

The Calypso thing I thought made sense. Basically somehow she had heard about Percy's promise and was waiting to be set free, but it never happened. So she is angry at the gods; maybe she doesn't know that most of the gods are having split-personality problems. Then Leo arrives, someone who doesn't look very heroic and is very different from those that came before; and Calypso is forced to realize that the curse is still on. However Calypso only ever gets companions every few hundred years, so to have 2 people drop down in the same decade could cause her to act that way; as she may be still trying to get over Percy.