Why does my partner crave a fearsome/terrifying demon?

Looking for insights into my partner's condition. She's in her mid-30's, polyamorous, submissive, masochist, and all her life has craved for a demon partner who is fearsome and terrifies her but is also loving/caring (I am not fearsome/terrifying). She underwent trauma in childhood with a narcissistic/strict father who is deeply religious/conservative, encouraged submissive/conformist behavior and meted out corporal punishment (spanking). Many of the behaviors that excite/draw her in this demon partner were exhibited by her father during her childhood - angry outbursts, erratic driving when angry, physical expression of anger. This demon craving has gotten to a point where she is no longer trusting of healthy/supportive relationships, viewing them as somewhat unnatural and not meant to last, even if they have a healthy dose of a supportive Dominance/Submission (D/S) dynamic that she craves. I am looking for insights from experts or people who've seen or experienced such behavior before and can recommend possible avenues of diagnosis/therapy to pursue. My own research on this behavior has led me to Complex PTSD and Trauma from narcissistic parenting, but yet to find a solid smoking gun that ties it all together.

Hello, and welcome to the forums!

Being a peer support forum, there won't be any 'experts' here. And since we no longer have an open Paraphilias forum, unfortunately there's no avenues to explore from anyone into BDSM.

It certainly sounds as if she's looking for, well, Daddy.

No one here can recommend a specific therapy path- that's going to have to be determined by getting her in somewhere, if she'll go. I hope you can get her to.