In the real world Keisuke Kurokai The Player behind Taihaku is a 28 year neurosurgeon living in Aichi whon works for CC Corp at their Hospital in Tokyo. Offline Kurogai is described as a young man is in his early thirties with a gentle appearance and handsome face. His mission is to help heal Lost Ones who have fallen comatose while in The World.
Seven years ago during 2010 while Kurogai was still an intern he often played with the younger Ryou Misaki [Haseo's player] who was once recovering from an experience with paralysis due to a long term coma. Kurogai started The World to learn about the effects of internet games on the human brain and would later join the arena as the best place to observe people while becoming an arena champion as he proceeded with his research.