Raidou

Raidou is a primary antagonist in the Dead or Alive series, debuting as the final boss in the first game. He is a rogue ninja from the Mugen Tenshin clan with the unique ability to quickly learn and copy fighting techniques. Raidou is the older brother of Shiden, the father of Ayane and Honoka, and the uncle of Hayate and Kasumi. He is ruthless and power-hungry, resorting to any means to gain strength, including the rape of Ayame (Ayane's mother), and gravely injuring Hayate. Although killed by Kasumi in the original Dead or Alive, he was later resurrected as a cyborg by Victor Donovan of DOATEC. In his cyborg form, Raidou loses most of his memories, but his thirst for power and revenge remains intact. In Dead or Alive 6, he is defeated and destroyed by Ayane, Kasumi, and Hayate. Raidou’s name in Japanese translates to "Thunder Path." He is a formidable foe and a central figure in the complicated relationships among the main characters.