Tori Hathaway is the daughter of a demon, Tori has a butler called Valentine, Tori and Valentine have the same contract as Sebastian and Ciel. But Tori contains a disease which isn't contagious but can kill her, it is the new disease only for demons, when Valentine finds Tori he explains everything, but it seems Tori and Sebastian are getting attached.

Sebastian + Demon Reader: You're a demon so bad that you were kicked out of hell by Satan himself. When Sebastian and his young master, Ciel, end up stumbling into your home on earth, when being sent by the queen after people start to go missing, and then turn up weeks later dead at the undertakers shop. You quickly feel some weird connection between you and Sebastian as they force you too live with them as proof that you weren't the one kidnapping and murdering people. How will you fit in with the crazy people at the Phantomhive manner and was Satan correct in banishing you from hell? Warnings: bad language, mentions of blood, violence -I don't own the Black Butler characters

Isabella Brieris is a Demon and has been a loyal servant to the Phantomhives for years, but after a great tragedy, what will happen when another Demon comes into the picture, and not only holds a deal for the soul of her young master, but also made it it his mission to turn her into his mate? (This is a Black Butler series rewrite Fanfic of Sebastian x OC reader. I do not own Black Butler. All original characters belong to the creators.)

A Sebastian mate story He knew his human form was appealing. People were so agreeable to the good-looking. His demon form would send them screaming, even though he thought it had its own dark appeal. To those willing to not run screaming. We're in for one HELL of a surprise. A Demons Mate and A Demons Bride are 2 separate books. They are based on the same anime but are 2 completely different books. *completed

The first ever female shinigami. Weird right? Even weirder with her being the younger sister of the Undertaker, reaping legend. What adventures await her as she runs into the well known dynamic duo that is master and demonic butler? Sebastian x OC

The Widow was the most feared assassin in all of the noble world. No one ever knew who she was to strike next. Sneakier than a fox, quieter than a mouse, and faster than a cheetah. When her next mission is to become a maid for a well known Earl with an amazing butler, will she be able to kill them, or will something she doesn't believe is real happen to her? I do not own Black Butler. Originally posted on Quotev on 4/21/2013

After Willow died of a tragic accident, something amazing happened to her. She woke up, breathing and her heart beating, in an unknown place by herself. It's obvious that something about her had changed, but was it good or bad? And where did Sebastian go? Will it keep her from being with him?

Reapers that have resigned are then Deserters, having all their duties as a Reaper terminated. Willow decided it was the only way to be with Sebastian, and now, she's traveling with him and Ciel. Still, it seems like Sebastian is keeping something from her, and let's face it: quitting is never easy for her. What's making things so difficult?

a demon not willing to accept the role she was birthed with . kira is a demon, but no ordinary demon, she has a reputation down in the demon world and has a deep secret to hide from every demon. what will happen if she bumps into a certain Butler and master on her way to complete another contract? especially when that Butler is falling for her deeply while she doesn't have a clue on what love is.

Charlotte is a demon. A Cat Demon. When the Earl of Phantomhive takes her in her life gets turned upside down when Demon Sebastian falls head over heels in love.