Ohica

Ohica was a priestess of the Sisterhood of Karn. She helped the Fourth Doctor destroy Morbius. She served Maren until Maren's death, then took on the role of High Priestess. (TV: The Brain of Morbius)
 * The Sisterhood had, in the Dark Times of Gallifrey, originated on that world, making the Sisterhood, by default, Gallifreyan biologically, if not culturally.