Nico Nothnagel is a German actor and voice actor based in Berlin. He completed his acting studies at the Hochschule für Musik und Theater Rostock, earning a diploma. Following his graduation, he worked in theater at venues such as the Anhaltisches Theater Dessau, the Maxim Gorki Theater, and the Volksbühne Berlin before transitioning to freelance work in film, television, and voice acting. His voice is described as dynamic, warm, and of medium strength, with a baritone register.

Within the field of anime and animation dubbing, Nothnagel has voiced a variety of characters. As noted in the query, he provided the German voice for Vidalshal in the series The Familiar of Zero: Rondo of Princesses. His other notable anime roles include Maron in To Love Ru, Geslan in Ranking of Kings, Thole in Vinland Saga, the Game Master in I'm Standing on a Million Lives, Great Gozu in Danganronpa 3: The End of Hope's Peak Academy - Future Arc, and an Otaku-Stalker in Dont Toy With Me, Miss Nagatoro. In the series The Iceblade Sorcerer Shall Rule the World, he voiced Howard Kennet.

Beyond anime, Nothnagel has an extensive list of voice credits in live-action series and films. He is known as the German voice of Cesar, a recurring character in the Chicago franchise, including Chicago Med, Chicago Fire, Chicago P.D., and Chicago Justice. He also voiced Lincoln Steffens in The Alienist, numerous characters in the LEGO Ninjago series including various announcer and game voice roles, and appeared in German adaptations of shows like Elsbeth, Ein Gentleman in Moskau, and Everybody Still Hates Chris. His film work includes roles in The Devil's Brigade - Die Spezialeinheit and Rebirth - Die Apokalypse beginnt.

Regarding recurring collaborations, Nothnagel has frequently worked as the German voice for several English and Japanese actors. He is a regular voice for actors such as Clay St. Thomas and Mark Hildreth in the LEGO Ninjago series, Cesar Jaime in the Chicago franchise, and Tsuguo Mogami in anime productions. A notable achievement in his career is his long-standing role in the Chicago series, which has continued across multiple spin-offs since 2012, establishing him as the consistent German voice for that character.