How about these...
Snow by NicoRavenPen
Betrayed on the eve of her wedding, dying in the snow, a miko from the future becomes something that frightens all...She becomes a Yuki-Onna. Frozen from the inside out, she must learn to live in the winter wasteland that she has become. Cold, unfeeling, frozen.
Rating: M, Status: Incomplete
Bloodlust by Lyra (not too sure about this one. It's been a while since I've read it)
When the quest is finally over, and the jewel is finally complete, Inuyasha reveals a desire for something he can never have. To escape his betrayal, Kagome leaves...and runs into Sesshomaru. Who knew that not being afraid could be more dangerous than the one you are supposed to fear? New update!
Rating: MA, Status: Incomplete
A Selfish Wish by Knight of Disorder
"I'm sorry guys," a lonely tear rolled down her face, "just this once let me be selfish." And before any of them could act, she made her wish. With a deep breath her love came back to life... while the jewel in her hand turned black... and with it her once pure soul. Based on Artwork by Aiko. A series of interrelated oneshots... for now...
Rating: M, Status: Incomplete
Re:Birth by Fire-- Flight of the Phoenix by Sylandria (not a demon but still)
A wish. A New Life. Betrayal. Attacked by rabid animals, a Mythical being with problems of her own happens upon the injured Kagome with a proposition. She is not what she seems and protection is needed by one youkai before destruction reigns.
Rating: MA, Status: Incomplete
All Thanks to a Genie by sarhea
The group runs into an unfamiliar magical being that transforms Kagome into an inu-youkai. Unfortunately InuYasha does not take it well and well… someone else steps up to the plate. For Dokuga Moderator’s Month 2012. Dedicated to Sugar0o who asked for 'Kagome as a demon'. No YIM please.
Rating: MA, Status: Complete
Evolution by sarhea
Repost of a fic on A Single Spark. What if being the Shikon Miko forced Kagome to evolve, to become something more... What would she become? Inspiration... Evolution by Eternity of Sins. It is a wonderful fic and I highly recommend reading it and Opposites Attracted. Warnings... This is an AU - I do not know how the real manga and anime ends.
Rating: MA, Status: Complete
The title of Lady is not given; It is earned by Speklez
The Shikon took the one demon that was never supposed to die. His infant pup fights to keep the West as is, even as everyone tries to take it away. What happens when the Lord returns and the only one to help keep his daughter alive was a human miko?
Rating: MA, Status: Complete
It Is What It Is by Danyealle-sama
Sometimes things start one way and end up another
Rating: MA, Status: Complete
Evolution of a Daiyoukai by Danyealle-sama
Obsessions have a way of changing every being, even Sesshomaru
Rating: MA, Status: Complete