What do you do when you've lost everything -- your friends, your family, your home, even the essence of what made you ... well, you? Jaina Proudmoore has undergone this transformation in Mists of Pandaria, and come out the other side a drastically changed woman as a result. After the successful defeat of Deathwing in Cataclysm, Jaina and her coastal city were the unfortunate target of the very faction she's spent years of her life trying to unsuccessfully champion. In the end, Jaina lost everything.
But where does that leave a leader, a diplomat, an advisor, a friend? It's an arguably dark place, but it's also arguable that this was just the character development Jaina needed. As a character, Jaina hadn't really had a lot of progression in her personality since she was introduced all the way back in Warcraft III. Wrath of the Lich King saw the beginnings of what would ultimately be a push into a dark place from which no one, not even a Proudmoore, could emerge unscathed.