Humanitys' Strongest Weapon (Shingeki no Kyojin fanfic)

Xyra Grantaine Wissen. She's the infamous unknown force behind the Survey Corps that can defeat a horde of titans in a matter of seconds like a tornado that swept everything it comes across. With her intellect and fighting skills believed to be on par with Humanity's Strongest Soldier - not that she'd ever met the gu...