Valkyrie

Appearance: She has a scar on her right eye (which is red) and often keeps it covered with a black or white eye-patch. Her left eye is a clear blue. Valk has two small horns protruding from her forehead. When she's out on missions she wears a mask with a "heartbeat" design. She has a large arsenal of weapons including including her trusty katana and hand guns. 

Personality: She seems cold and distant because she has difficulty expressing her emotions but she is actually a loving soul. She lacks faith in humanity but she finds she finds humans intriguing.

Details: Feel free to be creative with her assassin outfit (or any dominatrix inspired outfit lol) just keep in mind she wears  a lot of chokers, chains, latex and heeled boots.