She is portrayed by Shannon Tarbet.
Marie and her family meet Albert Einstein, as he is to stay at their home in Aarau, Switzerland until he finishes his studies. She also participates in her family's debates at dinner and encourages Albert to join in on the conversation. Marie also bonds with Albert while he stays there.
After Albert receives a letter approving his German citizenship renouncement, Marie finds this reckless. However, Albert finds nationalism to be a disease and would rather be world citizen. Marie then goes with Albert to teach him literature and French, but Albert dazes off and finds an answer to a question on time and space, and she falls in love with him.
When Albert passes his entrance exam for Zurich Polytechnic, Marie and the Winteler family say farewell to him. Marie is heart broken by him leaving, but he promises to write to her and they say their goodbyes to eachother.
At the Winteler house in Aarau, Switzerland, the family are celebtrating Marie's birthday. Her father Jost celebrates Albert and Maja for being so close to family. He also thanks Albert for his companionship with Marie.
After dinner, Marie asks Albert how he came to burn himself and Albert goes on to explain to her how it happened and brings up the physics behind it, but Marie begins to speak French to him, which Albert doesn't understand. Marie, who has no mind for physics, doesn't want to discuss science with him.
Later, upon leaving the Winteler house, Marie tells Albert that she wants to come to Milan with him, however, Albert says he is expected at Grossmann's house on the lake.
Marie and Maja discuss Albert's feelings for her. Maja assures Marie that Albert has alway gotten distracted at times and is always consumed with his studies. Marie desides to give him a gift, it being a tea pot.
Marie receives a letter from Albert informing her of his breaking up with her. She is brought to tears by this.