I can't lose them too... Not again. The following article contains significant spoilers and/or ending details of Valkyria Chronicles 4. If you don't want to get shot, tread carefully!
Imperial second lieutenant, age 20. A member of the experimental weapons squad, X-0. She and Chiara were taken in by Belgar at a young age. Extremely sadistic, and truly enjoys psychologically torturing her victims. Though tasked with overseeing Chiara and Crymaria, she often harasses them. Though she and Chiara seem like they could be close, she looks down on Chiara as a simpleton. They may be more alike than they'd ever admit. Due to certain "calibrations" done by Belgar, she's beome a brutal and loyal soldier. However, she's also become very emotionally unstable. Belgar's final calibrations ultimately shattered her mind. Fixated on his words that "failure would not be tolerated," she self-destructed.