Elizabeth

Known as Lizzie for short, she is the disciple of Shin'ichiro Ootori and a Qwaser on her own, who wields the element of titanium, which she uses in battle in form of an enormous greatsword named Excalibur, whose high-frequency blade can produce massive shockwaves and slice through almost anything. She is quite attached to Mafuyu. Although very strong as a Qwaser, she is quite brash and childish when not fighting, though she is also very responsible and reliable and, most of all, completely loyal to her master. This loyalty prompts her to aid Shin'ichiro in kidnapping Tomo, by fighting Sasha so as to repel his attempted rescue, where she is defeated but spared. (From Wikipedia)