門倉 夜彦

"Did you really think you could hide it from me? How many years do you think I've been your big brother?"

Kazuya's cousin and current guardian. He's dependable and handles most things skillfully. He easily gets along with people.

He cares for Kazuya like a real brother or parent would. He seems to follow a “sometimes gentle, sometimes strict” approach, but he's usually lenient.