Brandon Sanderson
Chapter Nine
Vivenna as a Viewpoint Character
Generally, Vivenna is the readers' least favorite character in the book. I can see why that is. Siri gets to be the flamboyant younger sister, Lightsong the pithy courtier, and Vasher the mysterious unknown. Vivenna, then, is saddled with the responsibility of being the older sister trying to do what is right. She's not as dynamic as the others, particularly from the start.
Perhaps this should have made me want to put more into her viewpoints. Change her to be more dynamic, perhaps. However, I resisted that. Of the four, Vivenna is the most like me. The older sibling who gets into other people's business, ostensibly for their own good. I was a lot like that when I was younger.
For me, Vivenna is the most interesting character in the book. Yes, Lightsong was the most fun to write—but Vivenna is the one who has the most potential for growth and change. Particularly because she isn't instantly appealing like the other three. Much like Hrathen in Elantris, Vivenna begins very far from where she would need to go if she wanted to gain the rooting interest of readers. You'll have to read on and see if she actually gets there.