Otacon is a fictional character from the popular video game series Metal Gear Solid. His real name is Hal Emmerich, and he is a brilliant scientist and engineer who specializes in robotics and technology. Otacon is known for his deep knowledge of machines and his ability to create advanced gadgets that help the game's protagonist, Solid Snake, in his missions. Throughout the series, Otacon becomes a close ally and friend to Snake. He often provides crucial support by offering information, hacking into systems, and assisting with strategy. His character is also notable for his emotional depth, as he grapples with the moral implications of his work and the impact of warfare on humanity.