percy's friends but not his mother
He is the god of the underworld To watch over the underworld and to make sure that no souls escape.
In "Charmed," Phoebe and Cole escape the Underworld by using a spell that allows them to access a portal. They work together to outsmart the Underworld's guardians and leverage Cole's demonic powers, ultimately finding a way to break free from the confines of the Underworld. Their escape highlights the strength of their bond and their resourcefulness in dire situations.
Odysseus is still alive.
Hades kept her alive, and she was held prisoner. The living are allowed to enter the Underworld and still be alive when they (rarely) return to the living world.
because Hercules broke in and out of the underworld alive
The Underworld is a place of rest, but often souls live out their afterlives in much the same way they did when they were alive. They have houses, daily tasks etc..
In Greek mythology, Hermes gives Percy the pearls to help him escape from the Underworld. Hermes is the messenger of the gods and known for his swiftness and cunning. He often aids heroes on their quests.
When he begins to fight Ares after they escape the underworld.
Yes. Odysseus is surprised to see her, as she was alive when he left.
you climb out of the grave
So far no
Cerberus eat live meat and when they do, the dead souls that live in the Underworld can escape but they cannot leave.