Kay Yuki is a central character in the anime series 'Uchuu Kaizoku Captain Harlock' (Space Pirate Captain Harlock). She serves as the chief navigator of the space pirate ship Arcadia, commanded by the enigmatic Captain Harlock. A skilled and intelligent member of the crew, Kay plays a crucial role in navigating the ship through the cosmos. Her calm demeanor and unwavering loyalty to Harlock make her an indispensable ally. Throughout the series, Kay's character is developed as a symbol of resilience and dedication, often providing emotional support to her crewmates in times of crisis.