Name: Kinjiro Oyama Age: 25 Height: 183cm

Past as a killer: He was a thrill-killer who took lives twice a week. Because he finished his crimes brilliantly during the night without leaving evidence, his crimes were never discovered. When he targeted Heisuke, he made a blunder and his identity was exposed, but he was threatened: "Instead of turning you over to the constables, become my child's bodyguard." Thinking that sounded interesting, he agreed.

He loves reading and luxury. Despite his duties to Guest, he is satisfied with his current life where he can eat good food, sleep in a nice room, and wear fine clothes. His favorites are Japanese sake and chestnut yokan.