User blog comment:SayuriDarling/The Mark of Athena Official Discussion/@comment-3146930-20130105054140/@comment-3146930-20130106013848

The difference between the Lotus Hotel and the Underworld is that the Lotus Hotel isn't full of dead people. It is full of living people frozen in time. The Underworld is full of the dead, so obviously they don't age while there. I mean she is described as being different from other revived souls (I think someone said she was warm or something, so she obviously has a heart beat), and she may be alive. I just wonder if every soul that returns to the living world will age normally or if Hazel is special somehow.

Rick needs to explain how this whole reviving thing works better. I mean it doesn't seem like Hazel returned to life using the Doors of Death, Nico just used Thanatos' capture as a way to sneak her out. Others seem to escape using the doors, but have defects (like when Medea got angry, you could see her skull and stuff). Maybe the others that used the Doors of Death only had their souls return to the Mortal World, but Hazel because she was pulled into the earth had her body and soul transported to the Underworld, resulting in her returning to normal when she escaped.