Manuela Eifrig is a German voice actress, singer, and dialogue director known for her extensive work in the German dubs of anime series and films. Born in Neuss in 1984, she began her career in the performing arts with a focus on musical theater. She attended the Stage School in Hamburg, completing her training as a state-recognized stage performer in 2006, the same year she started her career as a voice actress.

Eifrig has lent her voice to a wide array of prominent anime characters in the German-language versions. She is recognized for voicing Karin in Naruto Shippuden and Maka Albarn in Soul Eater. Another significant role is that of Kurisu Makise in the Steins;Gate series and its film adaptation. Her repertoire also includes Kumoko in So I'm a Spider, So What?, Azusa Nakajou in The Irregular at Magic High School, Amane Nakano in Kiss Him, Not Me, and the title character in I've Been Killing Slimes for 300 Years and Maxed Out My Level. In the series Kotaro Lives Alone, she is credited with voicing the character Mizuki Akitomo.

Beyond her on-screen roles, Eifrig's work frequently extends to behind-the-scenes creative positions. For the German adaptation of Kotaro Lives Alone, she served as both the ADR (Automated Dialogue Replacement) director and the ADR script writer. She also took on the role of dubbing director for the film Bright: Samurai Soul. Her voice is also featured in video games, where she has played notable characters such as Cait in Fallout 4, Jill Valentine in Resident Evil 3 (2020), and Cassandra Dimitrescu in Resident Evil Village.