Leonard Pfeiffer is a German voice actor born in Berlin in 1999. He began working in dubbing studios at the age of nine and has also participated in various radio play productions. Since 2019, he has been studying at the Hochschule für Schauspielkunst Ernst Busch.

Pfeiffer is primarily known for his work in German dubbing, providing voices for characters in animated series, films, and video games. In the realm of anime, he is recognized for voicing Zion Kunikida in the 2018 series Ingress: The Animation. His other anime voice roles include Solaceed in The Seven Deadly Sins: Revival of the Commandments and multiple characters in the Inazuma Eleven video game series, such as Shawn Froste and Caleb Stonewall.

His dubbing career encompasses a wide range of live-action and animated productions. Notable film roles include providing the German voice for characters in Beau Is Afraid (2023), The Lost King (2022), and Erna at War (2020). In television, his credits include series such as The Chosen, Lucky Bay, and On My Block. Pfeiffer's work is characterized by his regular collaboration with German dubbing directors and studios, contributing to numerous international productions for the German market.