How it happened
Fates: "You will never have an heir."
Hades: "Oh look Persephone's pregnant."
Fates: "The child is stillborn."
Hades: "I resurrected him."
Fates: "He's rebellious."
Hades: "We reconciled."
Fates: "He still doesn't want to rule."
Hades: "Persephone's pregnant again."
Fates: "It's a daughter."
Hades: "That's fine."
Fates: "She's stillborn and missing limbs."
Hades: "Resurrection."
Fates: "It went wrong and she's part ghost."
Hades: "...is that a problem?"
Fates: "And she was born on the surface so she's stuck there!"
Hades: "Hecate can guide her."
Fates: "..."
Hades: "..."
Fates: *smash the glass on the big red button marked 'Free the Titans.'*