Anja Nestler is a German actress and voice actor based in Berlin who has been active in the synchronization industry since 2008. Her work encompasses a wide range of voice acting for film and television, including significant contributions to the German dubs of numerous anime series and films.

Nestler's career in voice acting began in 2008, and she has since become a prolific and recognizable voice in German dubbing. She is also active as a screen actor and lends her voice to documentaries, commercials, and video games. A notable milestone in her career is her role as the official German voice of the character Barbie in animated films and series since late 2015.

Her extensive filmography in anime demonstrates her versatility across a variety of genres. She has taken on leading roles in major productions, such as providing the German voice for the protagonist Deunan Knute in the CGI film Appleseed Alpha and for the mysterious Miime in the 3D space opera Harlock: Space Pirate. She also voiced the character Maria in the coming-of-age film Words Bubble Up Like Soda Pop.

In the realm of television anime, Nestler has portrayed a wide spectrum of characters. She is known for her role as the competitive gamer Namie Yaguchi in Hi Score Girl and as the robot A37 in the Netflix original anime Eden. She voiced the character Claes in Gunslinger Girl: Il Teatrino and its OVA, as well as Yahiro Ifukube in Yosuga no Sora. Her other notable anime roles include Greyfia Lucifuge in the High School DxD series, Jenny Realight in Fairy Tail, Yukina Shirahane in Kuromukuro, and Kravitz in the Bakugan Battle Planet franchise. She has also had roles in popular series such as Komi Can't Communicate, Parasyte -the maxim-, and Detective Conan films.

Nestler has frequently collaborated with other Berlin-based voice actors and studios, a common practice in the German dubbing industry. For instance, she worked alongside Klaus-Peter Grap on the Barbie: Dreamhouse Adventures series. Her casting in anime productions like Eden also saw her alongside regular colleagues such as Jennifer Weiß and Bernd Vollbrecht. Throughout her career, she has voiced characters originally performed by a wide array of Japanese actresses, including Rie Tanaka, Yōko Hikasa, Kikuko Inoue, and Kaori Nazuka, among many others. Her consistent presence in the dubs of major anime titles and her long-standing role as the voice of Barbie mark her as a distinguished and accomplished figure in German voice acting.