Marie-Jeanne Widera is a German voice actor, dialogue director, and dialogue writer born on March 9, 1987, in Remscheid, Germany. She is primarily known for her work in dubbing anime series and films for the German market.

Widera pursued higher education in German and Romance languages at the University of Wuppertal before training in acting at a drama school in Düsseldorf from 2015 to 2017. She began working as a voice actor in 2019, quickly establishing herself in the industry.

As a voice actor, Widera has lent her voice to numerous anime characters. Her notable roles include providing the German voice for Maria in The Magnificent Kotobuki, Piltia in Interspecies Reviewers, and Slice in My Hero Academia The Movie: Heroes Rising. She also voices Charlotte Flambé in the long-running series One Piece, Jade Hunter in Rainbow High, and Leukozyt L-8787 in Cells at Work! Code Black. Other significant roles include Beelzebub in Beelzebub, Kin'u in Yashahime: Princess Half-Demon, and Scarlet in The Grimm Variations.

Beyond performing, Widera has made substantial contributions to German dubbing as a dialogue writer and director. Since 2020, she has worked with post-production companies in Munich, including Tonwerk München, Alpha Postproduktion, and Rescue Film. As a dialogue writer, she has adapted scripts for numerous anime series such as The Misfit of Demon King Academy, Cells at Work! Code Black, Eromanga Sensei, Haganai: I don’t have many friends, Kuroko’s Basketball, and Baki Hanma. Her work as a dialogue director includes overseeing the German dubbing for over one hundred episodes of One Piece, as well as series like The Misfit of Demon King Academy and Cells at Work! Code Black.

Widera's language skills include native German, fluent English and Spanish, good French, and basic Japanese. She also plays piano and has a background in various sports and dance styles.