Rita Repulsa is the main antagonist of the series. She is a pure evil, menace to society. Thousands of years ago she trapped the sage Zordon in a time warp. She is also in possession of the green power coin, which she later gives to Tommy Oliver.

In the original series, she is voiced by Barbara Goodson. She has a high-pitched, raspy, shrieking voice. You are welcome to try other takes on the character though. Regardless, here is the first episode of MMPR to get a better idea of how the characters sound and act in the original Mighty Morphin Power Rangers.