Through Dead or Alive 6's story, Marie Rose is shown to be both devoted and loyal, seen in how she behaves towards Helena who she is a servant to, and Honoka who she befriends during the course of their time together.Having been raised all her life by her gentle and loving grandmother, she is, in contrast to her father and half-sister, a sweet, easygoing kind of girl, but when she sees a fight, she cannot contain her excitement or the mysterious power surging within her.