Tobias Diakow is a German actor and voice actor born on February 28, 1990, in Frankfurt am Main. He pursued acting training at the Arturo Schauspielschule in Cologne from 2007 to 2011. Beyond his voice work, he has appeared as an on-screen actor in German television series, including roles in Tatort, Notruf Hafenkante, and SOKO Köln. He is also a co-founder of a publishing house focused on children's media.

Diakow is particularly well-known for his extensive work in dubbing anime and other international productions into German. He has provided the German voice for a wide array of anime characters. Among his most recognized roles are Naoto Tachibana in Tokyo Revengers, Al Lyon in Appare-Ranman!, and Hajime Saito in the Hakuoki film series, including Demon of the Fleeting Blossom: Warrior Spirit of the Blue Sky and Wild Dance of Kyoto. He also voiced Kosuke Kumagaya in the film Drifting Home.

His other significant anime voice roles include Yukine in Noragami, Shinpachi Shimura in Gintama, Kenji Koiso in Summer Wars, Tyki Mikk in D.Gray-man, and Yukio Okumura in Blue Exorcist. More recently, he has taken on leading roles such as Itsuomi Nagi in A Sign of Affection and the male lead, Senpai, in Don't Toy With Me, Miss Nagatoro.

His voice work frequently involves collaborations with specific dubbing studios, such as Oxygen Sound Studios for series like A Sign of Affection and Nagatoro, and TNT Media GmbH for Appare-Ranman!. For the Hakuoki films, the dubbing was handled by Digital Media Technologie in Hamburg.

In addition to anime, Diakow's voice is heard in a wide range of other media. He is the German dubbing voice for prominent actors like Harry Styles in films such as Eternals and Don't Worry Darling, and Dacre Montgomery as Billy in Stranger Things. He also voices Karl Vierstein in the long-running German audio drama series TKKG and has contributed voice work to numerous video games, including the character Ekko in League of Legends and Wrench in Watch Dogs 2. His professional profile on a voice-over marketplace lists major clients like Netflix, Apple, and Hasbro, and notes his vocal range covers teen, young adult, and middle-aged characters.