Dionysus is the god of grape-harvest, wine, ritual madness and ecstasy as well as theatre. Dionysus was often called the 'twice born' because of the two myths around his birth. The most common is that his mother was a mortal woman named Semele, who was a daughter of the King of Thebes, and his father was Zeus. This makes him the only Olympian to have a mortal parent, and according to some traditions the only one to have been born a mortal.
He invented wine and spread the art of tending grapes. He has a dual nature. On the one hand bringing joy and divine ecstasy. On the other brutal, unthinking, rage. Thus, reflecting both sides of wines nature. If he chooses Dionysus can drive a man mad. No normal fetters can hold him or his followers.
Dionysus is the son of Zeus and Semele. He is the only god to have a mortal parent. Zeus came to Semele in the night, invisible, felt only as a divine presence. Semele was pleased to be a lover of a god, even though she did not know which one. Word soon got around and Hera quickly assumed who was responsible. Hera went to Semele in disguise and convinced her she should see her lover as he really was. When Zeus next came to her she made him promise to grant her one wish. She went so far as to make him swear on the River St, yx that he would grant her request. Zeus was madly in love and agreed. She then asked him to show her his true form. Zeus, was unhappy, and knew what would happen but, having sworn he had no choice. He appeared in his true form and Semele was instantly burnt to a crisp by the sight of his glory. Zeus did manage to rescue Dionysus and stitched him into his thigh to hold him until he was ready to be born. His birth from Zeus alone conferred immortality upon him.