Katharina Lichtblau is a German voice actor, speaker, and moderator, also known professionally as Katharina Gast. She was born on March 12, 1984, in Remscheid. Her career is rooted in a background in acting, which she applies extensively to her voice work in dubbing.

Lichtblau has provided the German voice for a range of characters in anime and animated productions. One of her noted roles is Harami Mino in the anime film Laidbackers, where she lent her voice to the German dub of the character originally voiced by Rina Hidaka. Her work in the anime genre extends to other series and films. She is the German voice of Saemonza, originally voiced by Yuka Inoue, in the Girls und Panzer franchise, including the main series, an OVA, and a film installment. Her other anime credits include voicing Asfi Al Andromeda (originally Ai Kayano) in DanMachi OVA and DanMachi II, Aina Ardebit (originally Ayane Sakura) in Promare, and Hellvy Oberi (originally Shizuka Itou) in Knight's & Magic. She has also taken on roles in series such as Tari Tari, Photo Kano, Kandagawa Jet Girls, and Seven Mortal Sins.

Beyond anime, Lichtblau's voice work is heard across a wide variety of media. She is active in dubbing for live-action films and series, lending her voice to actresses like Sandra Mae Frank in Multiverse and The Silent Hour, and Felicity Jones in an episode of Doctor Who. Her distinctive voice is also a staple in German radio and advertising; since 2018, she has been a station voice for the radio broadcaster bigFM and has been featured in prominent national ad campaigns for companies such as Deutsche Bahn and EDEKA.

Lichtblau's career also includes work as a moderator and podcast host. She was a moderator for the long-running children's television program Tigerentenclub for five years. She is also the creator and host of the podcast My Friend Mic, which features conversations with colleagues from the media industry.