Kathrin Filzen is a German actress and voice actor known for her work in German dubbing productions. Born in Lisbon, Portugal in 1976, she is a native speaker of both German and Portuguese. While her career has largely focused on live-action roles in German television and film, including appearances in series such as Um Himmels Willen, SOKO 5113, and In aller Freundschaft, she has also contributed to the field of anime voice acting.

Filzen's most recognized anime voice role is that of Kirika Yuumura in the series Noir. In this 2001 anime, she provided the German voice for one of the two main characters, an amnesiac and highly skilled assassin. Her other notable credit in anime is the role of Selina in the 1996 film Slayers Return, part of the popular Slayers franchise. In this comedic fantasy adventure, she voiced a character named Salina in the German dub. Her work in both productions demonstrates her range within the anime genre, moving between the dark, serious tone of a crime thriller like Noir and the lighthearted, magical world of Slayers. A third anime credit listed in her filmography is a role in Slayers Perfect from 1995, further establishing her involvement in dubbing the Slayers series for German audiences. Her voice acting in these projects was performed for the German-language versions of the original Japanese anime.