Mephisto
Mephisto was the main antoganist of the Pretty Cure season, Suite Pretty Cure♪. Mephisto is the ruler of Minor Land which is basically the oppisite of Major Land. Mephisto's evil plot is to spread the Melody of Sorrow to make all worlds tragic and sad. Also he wants to fulfill his taste of music. Spoiler It is revealed that he was actaully the king of Major Land before he was hypnotized by Noise and became evil. That makes him Aphrodite's husband and Ako's father. Ako spent a long time trying to free her father from the spell that was cast upon him, and her love reached him, and restored him to his past self. So he is now, no longer an enemy.