Sailor Star Fighter is the civilian disguise of Kou Seiya, one of the Sailor Starlights from Bishoujo Senshi Sailor Moon. A confident, athletic, and somewhat teasing character, Fighter serves as a protector of Princess Kakyuu and the Star Seed. In the story, this character arrives on Earth with the other Starlights to search for their princess and confront the Shadow Galactica. Fighter also becomes closely connected to Usagi and the inner conflict between duty, identity, and love.