Passion and desire play a significant role in Brasileirinhas Marcia Imperator Possuida, driving the plot and character development. Marcia's relationships are marked by intense passion, which often leads to dramatic conflicts and emotional turmoil. The film suggests that passion and desire are essential components of romantic relationships, but also acknowledges the risks and consequences of unchecked emotions.
Her internal romantic arc is the core of the plot. She is not a passive victim. Possuida storylines typically show her fighting the possession during daylight hours, seeking out priests, shamans, or therapists. The drama comes from her "Jekyll and Hyde" moments—kissing her partner tenderly one minute, then biting his neck and calling him by a dead man’s name the next.