This is a villain OC that I haven't worked on a lot, so she may seem unfinished.

Name: Vipershade
Reason for name: Viper because that's what her name was as a rogue. Shade because of how she can suddenly turn dark and try to swallow you in her shadow.
Age: 34 moons
Personality: At first she seems like a kind, outgoing, friendly cat. But, when you know her for a while, she starts acting weird around you. Then, one day, she asks you to come to the border with her. And, bam, your dead. She's a really good liar, and prefers to work alone, so she sometimes makes a failed killing mechanism. She also kills in strange ways, not claw to claw combat. This made her not the best fighter, even though she has really sharp claws.
Appearance: Light gray she-cat with dark gray, almost black, tabby stripes. She has dark, venom green eyes and a small part of her right ear ripped off. Vipershade is a bit larger than average, and is a bit muscular, but not a lot of muscle. She also has sharp claws made for a killer, but prefers not to use them.
Clan: DarkClan (A dark oak wood forest that gets little sunlight, but lots of prey. The ground is usually slightly muddy, but not enough to truly get you muddy unless you walked or rolled around in it for a while. It has a stream flowing through the territory, leading to a large pond at the corner of the border.)
Family:
Mother: Mist (Mistspeck)- Light gray she-cat with tiny white specks all over her pelt and light blue-green eyes. She's a very small she-cat, almost the size of a large apprentice.
Father: Shade- Dark gray, almost black, tabby tom with black paws, a white tail tip, and very, very dark green eyes. He's very large and muscular and has really sharp claws.
Sister: Hero (calls herself Moon)- Light gray she-cat with white paws, a white tail tip, and dark blue-green eyes. Is small, but only a bit smaller than average. Has sharp claws, but not as sharp as Shade's.
Crush/Mate: None, she would probably kill them.
Closest friend: Redpaw
Why: She has had many relationships with many cats, but killed them later on. Redpaw, her apprentice, is the only cat she knew well and hasn't killed.
Enemy: None
Why: She is the enemy.
Mentor: Firefluff- Fluffy orange tom with yellow-orange eyes. He's average sized, but his fluff makes him look fat.
Apprentice: Redpaw- Semi-fluffy red-orange she-cat with green eyes. She's really small, but not small that she looks kit-like.
Backstory: Vipershade was born named Viper by the pond with her mother, father, and sibling. One day, though, when she was about 2 moons old, her sister went missing. Her parents said she was killed by a bear, but she didn't believe them. She did pretend to believe, though. When she was 4.5 moons old, while her father was hunting, the clan leader, Graystar, found her and her mother. He insisted they come to the clan. And Viper, now known as Viperkit, loved it! When she became an apprentice, she was mentored by Firefluff. And, while she apprenticed her, Viperpaw's father had found her and trained her to kill. One night,not the age of 10 moons, she murdered the deputy, Gingerflower, in her sleep. The Clan was both furious and sad, and she had put a good enough act on that the clan think it was Reedprickle. When she became a warrior, she had killed many cats (after getting to know them, by spying and conversation). And today, she still kills. But in the future, she is killed by a large pack of wolves.
Other: she dies at the age of 113 moons. While getting a drink, she gets attacked by wolves.