Dreamer (Nightmare)

Dreamer died before she was able to be born into the world. StarClan decided to stick there nose into this situation since poor Dreamer was going to be born into a curse/prophecy.  They brought her back for a second chance, though in bringing her back something went wrong and her markings and eyes went red. Her mother loved Dreamer like how she was, but her father hated her. He yelled about how she was a curse and a little monstrous nightmare. He forced the mother into changing Dreamer's name to Nightmare, her mother was reluctant at first, but finally had to. Nightmare's father was very abusive and neglected her.
One day, when Nightmare was a bit older, she noticed her father playing with her brothers. She tried to join in, but got attacked by her father. He ended up leaving a scar on her tail and scared her out of the two-leg house they lived in. She ran into the road, almost being hit, but pulled out of the road by a cat named Neon. Nightmare's father threatened her to not come back ever, hoping she would die out in the town. Nightmare ended up fallowing Neon around. Neon was irritated by Nightmare at first, but ended up becoming close friends as they grew up together.
Nightmare had multiple fights and encounter with her brother, Claw. One of the times she almost ripped one of his ears completely off.

Nightmare grew up on the outer edge of the forest. Neon, who often explored a lot, visited Nightmare often. The two ended up befriending a young ThunderClan warrior run away named RedFang. RedFang had left her clan to be with a BloodClan cat. Having quite a few litters with him. Her last litter was a small kitten named Raven. Raven's birth caught the eye of a murderous cat named BloodRose. She decided to crash the happy moment, going for Raven. Though Nightmare stood in BloodRose's way. This only annoyed BloodRose and she killed Nightmare immediately. Though the curse Nightmare was born into was she had the ability to hurt/kill BloodRose, the only problem is when Nightmare died she was forced to become the dark side of the small kitten, Raven. 

Nightmare's state as the dark side of Raven was odd. She was a ghost that only Raven could see and hear. Nightmare was chained to Raven and couldn't leave her side no mater how hard she tried. Nightmare figured out very early on that she could force herself into a physical state, but that would force Raven into the ghost position. Nightmare ended up going insane very fast after she was forced into this state. 

As soon as Nightmare become conscious after becoming a ghost, she out of anger switched to physical form, attacking BloodRose and getting a good hit on her shoulder. This scared BloodRose away.
RedFang ended up being killed by her own son later which caused Raven to flee into the forest. Nightmare protected Raven when necessary, but would also switch over to do  horrible things and torture Raven.
Nightmare killed Raven's adoptive mother, CrystalStar of NightmareClan.
She also has attacked multiple people Raven cares about. Like FoxHeart, Fauna, (add to list later)

Nightmare ended up finally being killed by Fauna, putting her down for good. Multiple times they felt bad and tried to bring her back so she could have a normal life. Though it took a lot of tries before she finally calmed down and settled down to start a family.
When she settled down she renamed herself Dreamer.