[ Name: Seishiro Kuki ] Age: 17 [ Ht/Wt: 172cm / 60kg ] Occupation: Govenment Spy [ Favors: Tranquilty and quiet ] Detests: Noise [ Voice Actor: Naoki Oikawa ] Weapon Signature: "Seiou", a blue tinted katana

Hailing from old Edo; samurai spy of the shogunate, Seishiro Kuki is assigned by the government to investigate and cease the disturbances in the prison island known as Riten-Kyo. With the uncanny ability to correctly anticipate an opponent's attack seconds before committed, the blue samurai's emotions are hesitantly given which in some instances is displayed as being callous.