Chief Thundercloud was an itinerant Sioux chief and warrior. He is the son of the Sioux Chief Orookee. He rides a horse named Grey wind. From Indian Braves #1: "In the days of the Golden West, when one frontier had died and another was just being born...history calls this period the "Bloody Era", for the ruthless cattle kings, the renegade Indians, and the lawless towns had finally come into their own! But out of the Black Mountains rode an intrepid Indian warrior destined to become a symbol of justice, striking terror into the hearts of his enemies and bringing law and order to white man and Indian alike! Such a man was John Thundercloud, greatly feared and respected!"