Yuuki

Lieutenant Colonel Yuuki (結城中佐) is Army Lieutenant Colonel and the founder of D-Agency.

Appearance
He is often shown in gray or dark-colored suit and wearing a white glove on one hand. On common occasions, he walks with a limp, in the support of a cane. He normally has a serious and stern expression, though he sometimes changes that while going undercover.

Plot
When Yuuki was younger he was hiding from enemy for many years as an excellent spy. He has brought a lot of useful information to japanese army. He was captured by the enemy by the betrayal of a fellow. He escaped while stealing information from them, when he saw a chance. Yuuki lost one hand in a torture that he received during the arrest.

Later he showed in a room where unconscious Arisaki Akira was. He paid for his care under certain conditions to Satomura: first - not to ask his name, second - to learn fake history of Akira´s life to whoever would ask about that.

Trivia
He was a close friend with Arisaki Akira