Because of the lack of respectable males in her life, Rei harbors a generally low opinion of men. She considers them emotionally weak and untrustworthy and seems genuinely uninterested in romance. The one exception is in a manga side-story centering on her, Casablanca Memories, which tells of Rei's friendship with her father's young secretary, Kaidou. He had been kind to her for her entire life and, in the story, she fancies herself in love with him. She is shocked when he suddenly announces his engagement to another girl and his decision to become a politician, despite having once said that he didn't like what had happened to Rei's family as a result of her father's work. Proof of her feelings are further cemented when she moves to kiss Kaidou, asking why, if he wanted to marry into the profession, didn't he choose to marry her due to her father's political influence. In the manga, this is the only potential romance in her life; in the live-action series, nothing of the sort is ever shown, as Rei unquestionably detests boys. In the anime only, she "dates" Mamoru Chiba in the first season (though he thinks they're just friends), and occasionally seems open to a relationship with Yūichirō Kumada, her grandfather's pupil. In one episode, on the brink of death, she states that she wished she had kissed Yūichirō before leaving.