| | | | Blood and Steel |
| | Yoshiro | Shimezu | The Samurai Warrior. |
| | Kasimoto | | The Shogun. |
| | Goro | Masamune | Japan's greatest swordsmith. |
| | Sengo | Muramasa | The alleged Masamune's apprentice.
A great swordsmith. |
| 1 | Wen | Li | One of the most powerful men in China. |
| | Walter | Han | Wen Li's proxy. An industrialist. |
| 2 | NUMA | | National Marine Underwater Agency. |
| | Vala | | A Norwegian geologist. |
| | Kurt | Austin | Head of NUMA's special projects. |
| 3 | Rudi | Gunn | The NUMA's assistant director. |
| | Joe | Zavala | Kurt's right-hand man. |
| | Paul | Trout | NUMA's lead geologist. |
| | Gamay | Trout | A marine biologist. Paul's wife. |
| 4 | Kenzo | Fujihara | A scientist. |
| 5 | Ushi-Oni | | The former Yakuza
assassin. Walter Hank's associate. |
| 6 | Akiko | | Kenzo's sergeant at arms. |
| 7 | Zhang | Heng | A Chinese scholar. |
| 11 | Superintendent | Nagano | The high-ranking Japanese police. |
| 13 | Sento | | The illegal gambling establishment. |
| | Gao | Zhin | Hank's chief engineer. Aka: Mr. Gao. |
| 18 | Hideki | Kashimora | The man in charge of Sento. |
| 32 | James | Sandecker | Former Head of Numa. The U.S. Vice President. |
| 40 | Priya | Kashmir | The
multidisciplinary expert. |
| 47 | General | Zhang | Head of the ministry for state security. |
