The Azure Flame Demoness, Izzy.
That was who was standing in front of Hannibal. A woman that was known to be the only woman capable of producing a blue flame throughout all of North America. During the civil war, there was a woman who burned everything to ash. It didn't matter how durable it was or even resistant it was. Whatever her blue flames touched were turned into ash. During the civil war, she sided with no one, and many tried to beat her to recruit her.
They all knew of her strength since she protected herself against the giant bugs and undead; they knew what she was capable of. However, no matter how many people they tried to beat her with, no matter how strong anyone else, no one could ever beat her. She turned everyone and everything to ash, even elemental attacks. Something that people found to defy the laws of logic or even physics since she could turn flames to ash.