Gale Raregroove was born in the Raregroove kingdom, as the heir to the throne. At the end of the war, he and Gale Glory became friends at a semi-early age. Right after the two met, they formed demon card. The goal was to rid the world of monsters known as demons. The organization grew, with people from all over the world as warriors. But, as time went by, the friends split apart. Gale Glory set sail to find a quiet life. While the other Gale was gone, King(with his new name), wreaked havoc among the people of the world. King also found a wife, and had a young boy named Lucia.

-Wikia