- Shisho Yamahachi (First appearance)
- Akira Yamahachi (First appearance, flashback only)
- Aliceshia Yamahachi (First appearance, flashback only)
- Hitoto Hanzou (First appearance)
- The Murderer (First appearance)
- Brash (First appearance)
- Hanzoudo Dojo (First appearance)
Akira Yamahachi and his wife, Aliceshia, are both Shinsamurai, both of which trained under the martial arts master Hitoto Hanzou. Their teenaged son, Shisho is currently training under Hitoto to also become a Shinsamurai.
One day whilst training, a shadowy figure interrupts Shisho's section. He kills Hitoto in combat, and, in a rage, Shisho grabs a wakizashi. The Murderer sends Brash, a large blonde man, after Shisho while he makes his escape. Fueled by anger, Shisho kills Brash. He takes the jewel around his slain sensei's neck and sets out to avenge his master's death.