Hades did suffer a consequence from losing his heart.
Emotionally, he had always felt numb. It was as though the thread that connected him to every feeling, whether joy, anger, grief, or fear, had been severed the moment he was cast into the mortal world. Nothing reached him the way it should have. Happiness did not warm him, sorrow did not wound him, and fear never truly gripped him.
For years, Hades learned emotions the same way one might learn a foreign language, by watching others.
He observed the way people smiled when they were pleased, the way their voices cracked when they were hurt, the way anger sharpened their eyes and laughter softened their faces. He memorized every reaction and taught himself how to imitate them. He smiled when the moment called for a smile, laughed when laughter was expected, and frowned when sadness was appropriate. He copied human feeling so perfectly that no one ever noticed the difference.
