Reiko is the twin daughter of Tatsu Yamashiro, Katana, and Maseo Yamashiro. He was burned to death in their house by Takeo Yamashiro. This sent his mother on her quest to become a samurai and superhero
Reiko was revived by a Black Power Ring, along with his brother Yuki, and fought Katana, Halo, Creeper, and Killer Croc. He was killed in the fight by Halo who killed him with light.