Shin Nitta is the manager of Card Capital and Tokura Misaki's uncle. He enjoys it when people are having a good time in his card shop. He refers his pet cat as the sub manager and even gets it to do certain tasks for him. He is rather knowledgeable when it comes to Vanguard.
He also acts as the manager for Team Q4 and arranges them to do certain events to raise their power and helps Sendou Emi develop her Vanguard skills.