Alia Atreides, A Host of Characters

"The Fremen see her (Alia Atreides) as the Earth Figure, a demi-goddess whose special charge is to protect the tribes through her powers of violence. She is Reverend Mother to their Reverend Mothers. To pilgrims who seek her out with demands that she restore virility or make the barren fruitful, she is a form of anti-mentat. She feeds on that strong human desire for the mysterious. She is living proof that the 'analytic' has limits. She represents ultimate tension. She is the virgin-harlot - witty, vulgur, cruel, as destructive in her whims as a coriolis storm."

―St Alia-of-the-Knife as taken from The Irulan Report

Dune Messiah, Frank Herbert