Diana Borgwardt is a German voice actress, not a Japanese anime voice actor. Born Diana Simone Borgwardt on March 22, 1966, in Berlin, she has built an extensive career spanning several decades, lending her voice to thousands of characters in films, television series, and video games for the German market. She began her work as a dubbing artist in 1987 after completing her acting and voice training.

Her filmography is vast and diverse, including many of the anime roles you've listed. She is the German voice for Yumiko Yazawa in the series Revisions, voiced by Aya Endo in the original. She also provides the German voice for Pinoko in the various Black Jack productions, including Black Jack and Black Jack: Capital Transfer To Heian, a role originally performed by several Japanese actresses. In the film Stand By Me Doraemon 2, she is the German voice of the iconic character Doraemon, voiced by Wasabi Mizuta in Japanese. For the film Oblivion Island: Haruka and the Magic Mirror, she dubbed the character Teo, whose original Japanese voice actor is Miyuki Sawashiro.

Borgwardt's work also includes the role of Evangeline in the Negima!? Spring and Summer OVAs, a character voiced by Yuki Matsuoka. She is the German voice of Balsa in Moribito - Guardian of the Spirit, with the original Japanese voice provided by Mabuki Andō. Her career began relatively early with the title role in the anime series Wunderbare Pollyanna (Pollyanna), voicing the character created by Mitsuko Horie. Additional anime dubbing credits from your list include a role in Gravitation: Lyrics of Love, where she dubbed a character for Asa Shirakura, and a role in the film Lupin III vs. Detective Conan The Movie.

Beyond these specific examples, Borgwardt is renowned for being the long-standing German voice of the Disney character Minnie Mouse in numerous productions and for her role as the warrior Android 18 from the Dragon Ball Z series, a character originally voiced by Miki Itō. Her work is almost exclusively in dubbing, where she replaces the original actor's voice with a German performance. With over 900 credited speaking roles, she is considered one of Germany's most active and established voice actors.