Personality

From what little has been shown, she seems to be a very energetic, cheerful, gentle, teenage girl, and spoiled which given her youth, fits well but she is shown to be gutsy.

She acts very childish, sometimes she acts like a drama queen, and doesn't seem to take losing lightly; she appears to be crying on the ground like a little girl when she loses a match, but if watched long enough, she lifts her face out of her hands before resuming her apparent fake crying. Judging by this, she seems quite aware of her cute appearance, and shows it through her win poses and taunts. Ironically, despite her often acting childish, Xtreme Venus Vacation reveals that she hates being compared to a child or treated like one. She also has little problem with wearing some revealing outfits, although she does have her limits, as during a Cover Girl photo op, even she was ashamed at having to show a significant amount of herself to Helena when she alongside Kasumi had to do a very suggestive "prayer pose" near the god statue, and she also objected to her Davi outfit's more revealing alternate form. She also at times tends to get distracted by other activities over obligations.

Aside from this, Marie Rose also tended to speak in a very formal manner, owing to her background as one of Helena's servants, although it's implied she has trouble trying to avoid acting formally to others in situtations not requiring it, such as when on vacation.