Nun

Nuns were (generally) female members a profession usually associated with religion or healing.

On Earth in the 20th to early 21st century a sisterhood of nuns were manipulated by a Gorgon, it was defeated by Sarah Jane Smith, Luke Smith, Maria Jackson and Clyde Langer. (SJA: Eye of the Gorgon)

On New Earth in 5,000,000,023 an order known as the Sisters of Plenitude operated the a hospital in New New York. (DW: New Earth)