Dick Diver is a fictional character from F. Scott Fitzgerald's novel, "Tender Is the Night." He is an American psychiatrist who becomes romantically involved with his patient, Nicole Warren. The story explores his rise and fall, highlighting themes of ambition, love, and the impact of mental illness. As the narrative unfolds, Dick's life becomes increasingly complicated due to Nicole's struggles with mental health and his own personal challenges. The character embodies the complexities of human relationships and the effects of societal expectations, ultimately leading to his disillusionment and decline.