Iris sees her New York life as glamorous and independent, and although being a prostitute at such a young age is unequivocally damaging, she most likely views Travis's rescue of her as a mixed blessing. In New York, she believes people love and need her, even if those people are her pimp, Sport, and the johns that visit her. She takes pride in being streetwise, as we see during her breakfast with Travis when she asks if he is a "narc" and turns his questions back on him. Though she is willing to entertain the thought of leaving Sport, she is about as likely to go back to her parents on her own as Travis is. Instead, she dreams of moving to Vermont. Though Travis has propriety, morality, and age on his side to justify his actions, his murders would have been more heroic had we not seen Iris dancing with Sport. Though he is her pimp, Sport comes across as comforting and romantic, and Iris clearly cares for him, for better or worse. Travis can neither see nor hear Iris and Sport in this scene. If he had seen it, he may have realized that his so-called heroism is most likely the least heroic in the eyes of the person he saves. After the murders, we don't hear from Iris again. She has disappeared back to Pittsburgh, and the only remaining sign of her is a grateful note her father wrote to Travis.