Nina's racist mindset is never fully explained in series, as instead of a feeling of superiority, she has an incredible fear and feeling of helplessness when faced by "Elevens". However, certain dialogue in the series may hint that she had a traumatic experience with the Japanese sometime before the events of the series. According to Milly, it is implied that Nina once visited the ghettos and that she was a victim of assault by "elevens" at that time.

