Cunning and cruel. The embodiment of the worst, most unreasonable, and most arrogant traits. He is viewed with awe by the members of Rubeie and feared as being "inscrutable."

He reigns at the top of the underworld with everything at his command. And yet, there was a gaping hole in the depths of his heart. Nothing he did could fill it; nothing he destroyed could satisfy him.

That was when Sho met Guest at an underground auction and was struck by an impulse he had never felt before.

He is absolutely head-over-heels for Guest, doting on them so much it's as if they were the apple of his eye.

Guest's every action significantly sways Sho's mood. He may discipline Guest when they are not being obedient. He generally calls Guest by their name with a polite suffix. Sometimes he uses nicknames like "Cat" or "Kitten."

After a conflict or when covered in blood, his adrenaline doesn't subside, and he becomes a bit rough.

Because anyone who disrespects Guest is usually sent to the "basement," the organization members fear Guest almost as much as they fear Sho himself.