Credit to Coffeebean for help on Zecora's lines in chapter 2.

Meet Rainbow Dash, a polite Griffon in pony's clothing. She's talented and loyal, but something in her past has made her abide by a different set of rules. She's a serial killer whose one golden rule makes her extremely likeable: she only kills bad ponies. And her job as a blood splatter expert for the Ponyville police department puts her in the perfect position to identify her victims. But when a series of brutal murders bearing a striking resemblance to her own start turning up, Dash is caught between being flattered and being frightened - of herself or some other fiend…