Nina is cold, indifferent, and ruthlessly efficient in her work. She exhibits little care for or trust in others, and especially enjoys humiliating her younger sister Anna, with whom she has a long-term rivalry. Anna takes cues from the femme fatale trope, matching her deadly occupation with her histrionic, flirtatious, and sociable personality. These traits contrast with Nina's cold, more reserved demeanour. Anna also appears to value connection with other people more than Nina does, as can be 