Raidou (Kanji: 雷道, Rōmaji: Raidō) is an exiled shinobi from the Mugen Tenshin ninja clan, and one of the main antagonists of the Dead or Alive series. Raidou is the final boss of the first Dead or Alive. He is the older brother of Shiden and uncle to Hayate and Kasumi.
A power-hungry being, he raped Shiden's wife, Ayame, which ended with her giving birth to Ayane, making the latter his daughter. He was killed by Kasumi during the first Dead or Alive Tournament in revenge for Hayate's supposed death. After Raidou's defeat, Donovan recovered his corpse and revived him as a cyborg in Dead or Alive 5: Last Round.
DOA5: Last Round
Following an explosion after his defeat at the hands of Kasumi, what was left of his body was soon found by Victor Donovan. He was reassembled and outfitted with cybernetic parts. The process of mechanization erased Raidou's memories however, leaving only his desire for power and destruction.
