Taken from http://headlines.yahoo.co.jp/hl?a=20060507-00000064-jij-soci:

News sources in Japan report the Machiko Soga, inarguably the biggest female figure in Japanese tokusatsu, died at age 68. Soga played so many memorable female villains in tokusatsu, such as Queen Hedrian in "Denjiman"(1980) and "Sun Vulcan"(1981), Bandora in "Zyuranger"(1992) and Queen Pandra in "Spielban"(1986) to name a few; last year she made
a special appearance in "Magiranger The Movie" as Great Majiel and this year she also contributed as a female villain character in PlayStation2 game "Uchuu Keiji Damashii (The Space Sheriff Spirits)"which is to be released on May 25.

Bandora's known as Rita Repulsa on MMPR. She will be missed.