Who is Hades' wife?

Can you enlighten me about the mysterious spouse of Hades, the god of the underworld in Greek mythology? I'm intrigued to know who shares his realm in the depths of the earth and what role she plays in the tapestry of ancient myths. Is she a goddess of equal stature, or does she hold a unique position within the pantheon? Her identity and their union seem to be shrouded in mystery, so I am eager to uncover the truth behind this enigmatic partnership.