Proper noun
Zagreus
(Greek mythology) An obscure figure in Greek mythology who, according to Orphic tradition, was the son of Zeus and Persephone who was destroyed by the Titans but reborn through the intervention of Zeus as Dionysus.
As far as Zagreus knew, Meg and Thanatos were his sister and brother in a sense, as it's only after he discovers Persephone that he discovers that isn't the case. Source: Internet
By getting to know Achilles and Patroclus (who is found in Elysium), Zagreus can give their story a happy ending. Source: Internet
These currencies allow Zagreus to do a whole host of things, ranging from weapon unlocks and character power-ups to paying a contractor to build a restorative spa room somewhere along the path through the Underworld. Source: Internet