Naka Kai is a character from the anime series Kantai Collection, which is based on a popular browser game. In the series, she is portrayed as a lively and cheerful light cruiser in the fleet of anthropomorphized naval warships known as 'kanmusu'. Naka Kai is often seen as the 'idol' of the fleet, always aiming to lift the spirits of her fellow fleet members with her energetic personality. Her role involves both combat and morale-boosting activities, making her a vital part of the team.