This article or section refers to elements from Expanded Dune.
Chaola Fenring was the mother of Hasimir Fenring and a trusted aide to House Corrino.
She had been trained as a Bene Gesserit before entering Imperial service as lady-in-waiting to Elrood IX's fourth wife, Habla. Meanwhile she had raised Hasimir well, preparing him for great things.
After Habla had cast Shaddam aside as an infant -- her only child by Elrood, she let Chaola Fenring, serve as wet nurse to him, and she raising the two young boys together while she attended Habla.
She had settled into a quiet home and lived on her Imperial pension after Habla's death.
In the Dune Encyclopedia Hasimir Fenring's mother is named Cirni instead.