I'm pretty sure Elysium was destroyed though, we barely made it out of it alive ourselves. That doesn't mean that the afterlife was been destroyed, though, does it? Or that death no longer exists. It just means souls now go to some other place, or stay on Earth, or vanish into nothingness.

[He shrugs, he really doesn't care at all about that. Ikki frowns at the next questions though, clearly annoyed and irritated. He doesn't know and he doesn't care, why should he?]

Maybe the previous vessels of Athena were less whimsical and selfish and actually thought Hades could be reasoned with next time? For that matter, why bother with protecting a world that all the other deities are sentencing to death? But I have an easier question for you. Why send children to trainings that will kill the vast majority of them to protect a girl that claims to be a Goddess? That's one which answer I would actually want to know.