Flemming Stein is a German voice actor born in Hamburg in 1996. He began his career in the voice acting industry at a very young age, with his first known credit dating back to 2001 when he was only five years old. After completing his schooling, Stein pursued studies in industrial engineering before ultimately returning to his artistic aspirations. He later completed a formal acting education at the Schule für Schauspiel Hamburg and has been active as a stage actor at the Schauspielhaus Hamburg since 2023.

Stein has built an extensive career spanning over two decades, during which he has lent his voice to hundreds of characters across animation, live-action dubbing, video games, and audio books. He is particularly well-known in Germany as the standard dubbing voice for American actors Joe Keery, notably in the series Stranger Things, and Tanner Buchanan, whom he voices in Cobra Kai.

In the realm of anime, Flemming Stein has an exceptionally prolific career and has voiced leading characters in numerous popular series. He has taken on a wide variety of roles, demonstrating considerable range. Some of his most notable anime roles include the protagonist Rio/Haruto Amakawa in Seirei Gensouki - Spirit Chronicles, Nasa Yuzaki in TONIKAWA: Over The Moon For You, Yatora Yaguchi in Blue Period, and Akira Shiroyanagi in Battle Game in 5 Seconds. He also voiced Kufa Vampir in Assassins Pride, Balto Phthalo in So I'm a Spider, So What?, Wanibe in The Dungeon of Black Company, Hacker in Akudama Drive, Kimura in Back Street Girls: Gokudols, Kogarashi Fuyuzora in Yuuna and the Haunted Hot Springs, and Limo in the film Flavors of Youth. His film work also includes voicing Susumu Yamazaki in the Hakuoki movies and Solaad in The Seven Deadly Sins the Movie: Prisoners of the Sky, as well as Jonathan in Glitter Force Doki Doki.

Beyond these roles, Stein has been a consistent presence in long-running franchises. He is the voice of Arthur Pendragon in the German version of The Seven Deadly Sins and has played Tatara Fujita in Welcome to the Ballroom, Kaname Isaki in A Lull in the Sea, and Boruto Uzumaki in The Last: Naruto the Movie. More recently, he voiced Reno Ichikawa in the 2024 hit series Kaiju No. 8, a role he discussed in an interview, expressing his personal connection to the character's determined and solution-oriented nature.

Throughout his career, Stein has collaborated on numerous projects that are part of the same franchises or production groups. For instance, his work on various installments of The Seven Deadly Sns, the Hakuoki films, and the Naruto franchise demonstrates his sustained involvement with these series. His role as Reno Ichikawa in Kaiju No. 8 placed him alongside fellow voice actors Felix Kamin and Kristina Tietz, with whom he shared insights about the dubbing process in a joint interview.

Among Stein's notable achievements are his longstanding presence in the industry since childhood and his ability to secure leading roles in major anime productions. His portrayal of iconic characters in globally recognized series like Stranger Things and Cobra Kai has made his voice familiar to a wide German-speaking audience. His work extends to video games as well, with credits in major titles such as Final Fantasy XVI as Joshua Rosfield, League of Legends as Hwei, and Resident Evil 3.