Det beror på vilket du trodde mest, eller vilken ritual som någon utförde för din begravning. Du ser också vad du vill se.

Vi ser detta citat i The Light Thief :

I said, "What're they doing to him?"
"Special punishment from Hades," Grover guessed. "The really bad people get his personal attention as soon as they arrive. The Fur - the Kindly Ones will set up an eternal torture for him."
The thought of the Furies made me shudder. I realized I was in their home territory now. Old Mrs. Dodds would be licking her lips with anticipation.
"But if he's a preacher," I said, "and he believes in a different hell...."
Grover shrugged. "Who says he's seeing this place the way we're seeing it? Humans see what they want to see. You're very stubborn - er, persistent, that way."
Percy Jackson and the Olympians: The Lightning Thief, chapter 18: "Annabeth Does Obedience School"

Så vi ser att predikanten kommer att se det kristna helvetet, medan Percy och Annabeth ser den grekiska underjorden.

Vi ser också detta med den romerska soldaten i The Throne of Fire :

The ghost looked offended. "Roman, of course. Following those cursed Egyptian customs is how we all ended up here to begin with! Bad enough I got stationed in this god-forsaken oasis - as if Rome needs a whole legion to guard some date farms! Then I had the bad luck to fall ill. Told my wife on my deathbed: 'Lobelia, an old-fashioned Roman burial. None of this local nonsense.' But no! She never listened. Had to mummify me, so my ba is stuck here forever. Women! She probably moved back to Rome and died in the proper way."
[...]
Mad Claude waved his hand impatiently." Sometimes, yes. Not as much as in the old days. Their spirits sleep most of the time, now. The point is, no matter how bad a death these people had, their fate after death has been worse! All of us - all these Romans living in Egypt - got an Egyptian burial. Local customs, local priests, mummify the bodies for the next life, et cetera. We thought we were covering our bases - two religions, twice the insurance. Problem was, you foolish Egyptians didn't know what you were doing anymore! By the time we Romans came along, most of your magic knowledge was lost. But did you tell us that? No! You were happy to take our coins and do a shoddy job."
"Ah." I backed away a bit more from Mad Claude, who was now glowing quite dangerously. "Well, I'm sure the House of Life has a customer service number for that -"
"You can't go halfway with these Egyptian rituals," he grumbled. "We ended up with mummified bodies and eternal souls tethered to them, [...]
..."We couldn't go to Pluto's realm like good Romans," Mad Claude went on, "because our bodies were prepared for a different afterlife. We couldn't go to the Duat, because we weren't given the proper Egyptian rituals...
The Kane Chronicles: The Throne of Fire, chapter 16: "...But Not as Evil as Romans"

Så med Mad Claude ser vi att hur organen är beredda påverkar vad som händer med dig när du dör.

Jag tror att allt beror på vad du tror på, eller vad är din "huvud" pantheon. Percy Jackson skulle förmodligen gå till Hades rike, för att han är grekisk (såväl som att vara en grekisk demigod). Hazel Levesque skulle gå till Plutos rike, eftersom hon är romerska (och hennes pappa är Pluto). Jason Grace skulle gå till Hades rike, för att han valde att vara grekisk. Men om en av dem fick en egyptisk begravning skulle de gå ner för att få sitt hjärta vägt med Osiris - kanske . Detta är inte exakt bekräftat i böckerna.

Det här är allt baserat på grekiska / romerska / egyptiska interaktioner. Norse kastar en bit av en skiftnyckel i verken. Jag har ingen källa till det här, men jag tror att om en Valkyrie tog en grekisk demigod, till exempel, som också trodde på norrsk mytologi, skulle det fungera.

För någon som inte trodde på någonting ser det ut som att en Valkyrie kunde ta dem och de skulle se Hotel Valhalla som vanligt, eller de kunde gå till Underjorden eller Duaten - men de hade se vad de vill se . Detta skulle inkludera kristen teologi, och om du är ateist, får du inte ett liv efter allt, som vi ser i Lysdjuven .

Slutligen verkar jag komma ihåg att Mist och underjorden är alla bara lag av Duat, som ses antingen i Sobekens Son , Serapisens personal , eller Crown of Ptolemy , men jag har inte de som finns just nu.