Kokoro (Japanese: 心) is a young Japanese maiko (apprentice geisha), and baji quan martial artist in the Dead or Alive series, who made her official debut in Dead or Alive 4. A sweet and polite girl, Kokoro is the illegitimate daughter of Fame Douglas and one of his former mistresses Miyako, making Kokoro the half-sister of Helena Douglas. It is possible that if Helena were to give up her control of the Dead or Alive Tournament Executive Committee, Kokoro would be next-in-line to take control. However, it seems that Kokoro has little to no knowledge of her connection to DOATEC and the Douglas family.