Konoe A. Mercury, also known as Nine the Phantom, is a pivotal character in the BlazBlue series. As one of the Six Heroes and a genius magister, she is renowned for her mastery of magic and her role in creating the Azure Grimoire. Nine is the mother of Kokonoe and the wife of Jubei. In the series, she becomes the antagonist 'Nine the Phantom', driven by her desire to reshape the world after witnessing its corruption. Her intellect and power significantly influence the story's events.