The problem is that Kiki went into the Joint Medical Service with the intent to save lives. Regardless of the military training that she has received, Kiki has always sought to follow that path; having been told that two people are dead because of her direct actions has been a blow to her soul.Kiki needs to realize that, yes, she was the target, but they were shooting at not just her, but her squad. She had a duty to defend not only herself, but her squadmates and they were seriously the bad guys, not her. They only got what they deserved. PERIOD.
And we know how she reacts when she cannot save a life because of circumstances beyond her control.