She stopped being a character after Wotlk. Now she's just a plot mechanism meant to push the story in a specific direction. Nothing about her is consistent. Her book might as well be scrapped because we're directly inside her inner thoughts, yet not a single thought was about the Jailer. She's working for a guy who created a lich king, a guy who also employs Kel'thuzad. She is sure about their plan, but then she shows doubts becaue cute blonde human. Honestly she's a mess and you can tell she's receiving special treatment from blizz.
Hopefully we just kill her in 9.1 and with 10.0 we move into a new WoW era clear of Sylvanas bullshittery. If only they just killed her after ICC sigh.