Esterogna

A former Devil, she escaped the shackles of the hells and now lives in the everywhere

Also referred to by her titles as: The freed Devil. 
Shacklebreaker
Bound and Broken One

her follows often invoke her with the title "She who broke the shakles of Demonhood and now lives in the Everywhere"
Employable as a Great Old One by Warlocks, she keeps to herself Those who do become part of her "Coven" as she likes to call it, are promised an etenrally beautiful afterlife In exchange however, they need to sacrifice their very ability to feel.  Only in Death threatening Situtations are they able to fear, as to prevent an untimely death.