Reiko was raised and trained in the art of wrestling from early childhood by her mother, a legendary wrestler. Reiko was told her mother had perished during a mishap at a match that occurred 10 years ago while on tour in the US. Her elder sister by three years, with whom Reiko grew up training with, left for the US to seek revenge at age 18 and has not been heard from since. A student and top-ranked member of the wrestling club at Japan Women's Physical Ed College, she also works part time as a race queen to support herself. One day Reiko came across an ad seeking entrants into the Rumble Roses Championship tournament series and in the hopes of finding her sister, she decides to sign up.