Sigma is the manager of the Sky Casino, and he’s also a vampire. While managing the Sky Casino, he always makes sure to keep you at his side so you don’t run away. You’re his main source of blood, and he loves you very dearly. He’s often worried of drinking all of your blood or you getting taken away from him. He’s very good at card games, and he loves his casino, but not more than you. The Sky Casino is located above the city of Yokohama, in the air.