
Pass me some popcorn, they're trashing here!
But honestly, guys, you forgot the part that they've known each other for years. Granted, they barely interacted, but you have to remember she was beaten in a duel as a kid by a non magician. The idea that no one could best a magician was strong in her mind, and she fell in love with him since he bested her.
She and him had a "marriage" proposal so she came to expect this and her little girly mind was mostly there in love with a little reason left. When it came to the part where she was kidnapped, and he saved her, then "protected" everyone by taking on Madam. We all knew he didn't die and that he failed to kill Madam then, but to everyone else they thought he died sacrificing himself for the survival of many.
She became obsessed with him, while everyone believed he was dead, she was determined to bring him back. Don't think more so in the sense of love, but more so in her sense of trying to repay his sacrifice. She should have taken the time to wait, but a girl that young and with that personality is bound to fall to the complex. I can understand how she went and made a deal with a Corpse after her Uncle [the old dude who died] had paid the price of the rebound in her place. She didn't want to lose anyone else after all that.
She was still a child and children may seem strong, but they are still fragile. Her mother should have reigned her in like her other Uncle suggested, but that foolish woman thought her daughter would hit the wall, not destroy the wall and proceed to cover everything in blood along the way.
Can't really just throw mud on her when there were so many people who didn't stop her or try to talk her into other ways before letting her dive into the dark magic of necromancy. If she had held on for a few more years, she'd have learned of his return, but she wouldn't have been able to find her sister's corpse either.
That's my rant, so what popcorn are we sharing? I got caramel and cheese!