Dr. Kurogai is a neurogeon working for CC Corp at their Hospital in Tokyo. 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 who was once recovering from an experience with paralysis due to a long term coma. Dr. Kurogai is also the same doctor in charge of over seeing Shino Nanao, Chisagua Kusaka, Takumi Hino and Reiko Saeki. His name tag reads KUROGAI.