Contrary to her tough-looking appearance, Marnie is a sweet, slightly shy girl that normally hides her soft side and emotions behind a veneer of calm. Likewise, she is normally a calculated and composed strategist who mostly hides her competitiveness in battle, but will still compete fairly with sportsmanship. She is sometimes annoyed by her wild fans, but as long as they do not bother others, she actually appreciates their support. Although she is generally emotionless on the surface.