Ophelia "Rippling Ophelia, Blood-Soaked Warrior"
About
Ophelia is an offensive type, and her trademark ability is "rippling" her sword by waving it back and forth with great speed, making it very hard to block or dodge.
Her hatred for awakened beings stems from an event in her past, where a certain Awakened killed her brother.
Her death on 8th volume can be a reference to literary work Hamlet (William Shakespeare). More specific, a reference to the paint "Ophelia" by John Everett Millais.