Who is Hades to Zeus?

Zeus wanted to reunite with his brother. He also liked Zagreus as the spouse of his sister, and wished they could be together again.

Hades is the king of Underworld. He wears a helmet that makes him invisible. He is stern, pitiless and not capricious like Zeus.

Persephone

Demeter was devastated when Hades abducted Persephone. She