Vivenna is a character from the fantasy novel "Warbreaker" by Brandon Sanderson. She is the princess of the kingdom of Idris and is known for her strong sense of duty and responsibility. Vivenna possesses the ability to manipulate colors through a magical system called Awakening, which allows her to bring inanimate objects to life. Throughout the story, Vivenna embarks on a journey to rescue her sister, Denth, who has been taken to the vibrant city of Hallandren. As she navigates the complexities of politics and magic, Vivenna learns about her own strengths and the true nature of power, ultimately challenging her preconceived notions of duty and identity.