Throughout her work as a seiyuu, Miki has made a guest appearance at well over 60 events such as the "Voice Bloom event" on March 14, 1998; the "Emotion Festival in Hiroshima & Fukuoka" on July 22, 2000; the "Animate Expo 2003" on January 26, 2003; and the "Kisty Live and Talk at Tokyo Kokusai Anime Fair" on March 26, 2006.
In 1996, Miki appeared in an introductory DVD release of the series, Kidou Senkan Nadesico Tokubetsu Senkouhen "Belle Equipe" he Youkoso. Miki, as well as other seiyuu, were interviewed by Houko about their work and experience in doing the series.
On November 26, 1999, Miki released her first solo CD, Seraphim Call 5 Yume no Naka no Imouto he. She played the character Murasame Shion. Miki has also appeared on over 30 miscellaneous CDs where she either sang or talked.