Achim Buch is a German actor and voice actor, born in 1963 in Rheinbach, Germany. He trained at the Folkwang School in Essen from 1984 to 1988 and has since built an extensive career on stage, performing with renowned theaters such as the Thalia Theater in Hamburg and the Deutsches Schauspielhaus Hamburg. In addition to his stage work, Buch has appeared in television and film productions, including a role in the movie Valkyrie.

Alongside his on-screen performances, Buch is highly active in voice acting, lending his voice to numerous characters in German dubs of international films and series. His work includes voicing Baze Malbus in Rogue One: A Star Wars Story. He is also known for his extensive contributions to the German dubbing of anime, where he has portrayed a wide variety of characters.

His anime voice roles are numerous and diverse. He voices Toushirou Hijikata in the long-running series Gintama and its films. He is the German voice of Elias Ainsworth in The Ancient Magus' Bride and its OAV sequel. In the world of Noragami, he plays Daikoku, a role also noted in coverage of his work on Back Street Girls. His other prominent roles include Leol in Hunter × Hunter (2011), Ronandt Orozoi in So I'm a Spider, So What?, and Graf Orlock in The Case Study of Vanitas. He also voices characters in longer-running series such as Kazuma in Naruto Shippūden and Gyukimaru in One Piece.

Confirming the examples provided, Buch's credits include the role of Bart Bagley in The Faraway Paladin. He voices Kimanjirou Inugane in the comedy series Back Street Girls: Gokudols. In the Netflix original anime Yasuke, he is the voice of Morisuke. He provided the German voice for Escanor in the Netflix redub of The Seven Deadly Sins the Movie: Prisoners of the Sky. He also voices Benjamin Canopus, a character appearing in both The Irregular at Magic High School: Visitor Arc television series and the film The Irregular at Magic High School The Movie: The Girl Who Summons the Stars.

Buch's work frequently brings him to dubbing studios in Hamburg, such as Postperfect Hamburg GmbH for Back Street Girls and CSC-Studio for Yasuke. His broad vocal range is evident in the variety of characters he portrays, from the proud and powerful Escanor to the comedic Kimanjirou Inugane. Beyond anime, his dubbing work also includes Western animation, such as voicing King Randor in Masters of the Universe: Revelation and Revolution and Okino in Lego Ninjago: Masters of Spinjitzu.