Dagger was sold in her puppy years to mercenaries, who trained her for battle in the coliseum. However, her albinism brought with it some health problems, which made it difficult for her to fight.

She knew it was the end of her group when they sent Kuronire to kill her. The praire, full of bloodlust, would not listen to reason, and after smashing the cage and injuring her, Dagger was able to flee while others tried to control the rampaging rook.