Dorothea Mölders is a secondary character in the second season of the anime, introduced as the wife of the wealthy German merchant Wilhelm Mölders. She is a German woman who relocated to England with her family after her husband established his business there, settling into a large estate in Yorkshire. Together with Wilhelm, she has two children, a son named Erich and a daughter named Ilse.

In terms of personality, Dorothea is defined by a vibrant and straightforward nature that often defies the strict social conventions of Victorian England. She is described as a passionate, dynamic, and friendly woman who has never much cared for rigid propriety. This manifests as a charming carelessness and a tendency to be unapologetically comfortable in her own skin, sometimes to an unconventional degree that flouts the era's expected modesty. She has a taste for flamboyant and novel things, coupled with a personality that is open and without deceit. Beneath her high-spirited exterior, she is also a self-assured individual who takes pride in her appearance and approaches life with a refreshing lack of pretension. Her marriage to Wilhelm is portrayed as a passionate and enduring one, having begun in Germany after she nearly rode him down while riding a horse, a typically unladylike activity that highlights her untamed spirit.

Dorothea's primary motivation is to manage her household and navigate the social landscape of the English upper class on behalf of her husband. Being newcomers with foreign roots, they face a degree of disdain from the established aristocracy, and Dorothea frequently attends parties and dinners to act as a bridge for her family. Her role in the story is pivotal as she becomes the new employer of the protagonist, Emma. After a chance encounter at King's Cross Station, where she briefly mistakes Emma for her own assistant, Dorothea impulsively hires Emma as a maid. This decision provides Emma with a safe haven and a new beginning away from London. She shows a notable lack of concern for formalities, such as letters of recommendation, which surprises the more rigid servants in her household. She treats her staff with an approachable warmth that sidesteps the expected haughtiness of her station, and she interacts with them in a direct and unceremonious manner.

Her key relationships are central to her character. She shares a close friendship with Aurelia Jones, known in the series as Mrs. Trollope, a bond that proves crucial to the story's later developments. She is also deeply devoted to her husband, Wilhelm, and the two are shown working together to manage their family and social obligations. Dorothea does not undergo a significant personal transformation over the course of the narrative, but her consistent, open-hearted nature provides a stark contrast to the more repressed characters of London's high society. Her decision to bring Emma to London on a trip inadvertently sets the stage for a pivotal reunion, and her generosity and friendship ultimately help pave the way for the story's resolution.

Notable abilities or characteristics include her remarkable social energy and her skill at navigating upper-class functions, which she often attends in place of her husband. Despite being an outsider in English society, her self-confidence and directness allow her to hold her own. The creator of the manga, Kaoru Mori, has noted that the visual role model for Dorothea was the famous opera singer Maria Callas, which informs her striking and dramatic presence.