Kate Hoshimiya is a young girl of undisclosed age, and the leader of Zvezda, a secret organization bent on conquering the world. Despite usually behaving as a child her age, she has a group of loyal followers that gathered around her out of respect, friendship or fear. She also possesses the secret power of persuading every being with a human heart to do her bidding. Despite her looks, she is an  ageless immortal, and was the leader of Zvezda since countless millennia.