Ro-500, also known as U-511, is a fictional submarine character from the popular browser game and anime series, Kantai Collection. In the series, she's depicted as a cute, anthropomorphized version of a German Type IXC U-boat that was transferred to the Imperial Japanese Navy during World War II. With a shy and reserved personality, Ro-500 serves as a dedicated and stealthy scout, often supporting other fleet girls in naval battles. Her character adds diversity to the fleet, representing international cooperation within the historical context of the game.