Boy George, whose full name is George Kamamoto, is a distinctive and recurring character known for his highly unusual appearance and surprising dueling skill. He first appears during the Sacred Lands arc as an older duelist who is notably short in stature. His most memorable trait is his choice of attire: a pink bear suit, often accessorized with a pacifier, and he customarily rides in a motorized baby carriage. Despite this childish and bizarre presentation, he is anything but a novice.

His background reveals a family connection, as he has a stepmother named Catherine. Personality-wise, Boy George is a complex figure who masks a formidable competitive nature behind his infantile persona. He is a highly skillful duelist, capable of defeating strong opponents like Mimi with relative ease during his first appearance. However, his abilities are not without limits; he has faced significant defeats, such as a loss to Yu Fua in Duel Masters Charge, which led to his withdrawal from a tournament. A key aspect of his personality is a struggle with pressure, as demonstrated in a duel against Master Yuki. He initially lost a high-stakes match due to an inability to cope under the psychological weight of the competition and a specific, humiliating condition. Demonstrating growth, he later returned to beg for a rematch, having learned to control himself and manage the pressure, ultimately securing a victory.

Boy Georges role in the story is that of a recurring rival and a test of ability for other characters. He is often depicted in tournament settings, such as navigating a labyrinth and defeating multiple foes, including Multi-Card Monty. His presence serves as a benchmark for skill, and his actions can attract external attention; for instance, cheating opponents once focused their efforts on him during a tournament, recognizing him as a significant threat. A key relationship is with Master Yuki, whose training house for Baby Duelists provided a crucial learning experience that forced Boy George to confront his own weaknesses.

Over the course of the series, Boy George undergoes subtle but notable development. Beyond learning to handle pressure in duels, his skills evolve in a more tangible way through his deck-building. He initially used a Water Civilization deck based on the Liquid People race. Over time, his strategic preferences shifted dramatically. In Duel Masters Charge, he adopted a Water and Darkness deck. Later, in Duel Masters Cross, he changed to a Fire and Nature civilization deck. By the time of Duel Masters Cross Shock, he was utilizing a Nature Civilization deck focused on the Dreammate and Vehicle Bee races, later incorporating psychic creatures of the Kankuro line. This constant change in civilizations demonstrates an adaptable and evolving approach to the game, showing that he is always refining his strategy. The character is shown to persist across time, as he appears again more than twenty years after the initial story, with his appearance largely unchanged. His notable ability, therefore, is not just his raw skill but his remarkable adaptability and his capacity for personal and strategic growth.