Larissa Koch is a German voice actor based in Berlin. Beyond her voice work, she is also a moderator, journalist, and health consultant. Her professional training includes a speaking education at Rundfunk Berlin-Brandenburg and a year of vocal lessons. She has a background as a news speaker for Kulturradio and is actively involved in improvisational theatre.

Koch provides the German voice for a wide range of characters in animated series and films. In the Netflix anime series Pacific Rim: The Black, she voices the artificial intelligence system Loa, taking over the role from the original English voice actor Erica Lindbeck. She is also the German voice of the Crimson Demon clan member Arue in the KonoSuba franchise. She first voiced the character in the 2019 film KonoSuba: God's Blessing on This Wonderful World! Legend of Crimson and later reprised the role for the 2023 spin-off series KonoSuba: An Explosion on This Wonderful World!.

Her other voice roles in animation include Willa in ThunderCats Roar! and the stray witch in Grimoire of Zero. She has also contributed to the Ghost in the Shell franchise, voicing Sano in Ghost in the Shell: Stand Alone Complex - The Laughing Man and Vize-Ministerin Kitahara in several Ghost in the Shell: ARISE installments. In addition to animation, her extensive voice work encompasses numerous live-action series and films, such as the computer voice Eleos in Star Trek: Picard, Spencer in Tulsa King, and characters in Archive 81, 9-1-1: Lone Star, and The Flash. Her repertoire also includes documentaries, image films, video games, and audiobooks.