Metal Gear Ray is a powerful bipedal mecha featured in the Metal Gear series, primarily debuting in 'Metal Gear Solid 2: Sons of Liberty.' Unlike previous Metal Gear models, Ray was designed to counteract and destroy other Metal Gears. It plays a pivotal role in the story as both an adversary and a symbol of escalating arms technology. Its advanced agility, aquatic capabilities, and impressive firepower make it a formidable opponent for protagonists like Raiden and Solid Snake.