Florian Klein is a German voice actor known for his work in the German dubbing industry, providing voices for characters in anime series and films. One of his early notable roles was providing the voice for the character Yamamoto in the 2004 anime series Rozen Maiden, a role he reprised in its sequel, Rozen Maiden: Träumend. He also contributed to the Tsubasa Chronicle franchise, voicing the characters Enkel in one episode and Sang-Yun in another. His role as Yukinojo Toyama in the series The Wallflower is a key credit in his filmography.

Klein is particularly recognized for his significant work within the Code Geass franchise, specifically the OVA series Code Geass: Akito the Exiled. In this series, he served as the German voice for the character Yukiya Naruse, who was originally voiced by Japanese actor Yoshitsugu Matsuoka. He voiced this role across all five installments of the OVA series, including The Wyvern Has Landed, The Torn-Up Wyvern, From the Memories of Hatred, The Brightness Falls, and To Beloved Ones. In addition to his anime roles, Klein has performed voice work for films outside of anime, such as the 2005 film Tsubasa Chronicle: The Princess of the Birdcage Kingdom.