Future Warrior, or Eliza in the Future Warrior game is a character in the Nightwolf series, and is supposedly Nightwolf's best friend, however, she usually has no character growth, except in the Future Warrior game. Her Eliza personality will play a major role in Nightwolf: All Wrapped Up.
She used to be a reploid named Eliza. Spirits from the past were drawn to machinery in her time by Boxus Green, a villain. Eliza headed back in time, naming herself Future Warrior to befriend Nightwolf and change the past so the spirits, who happened to be spirits of people from Nightwolf's life, rest in peace.