Agent Dale Cooper is really interesting. He's the outsider who comes to Twin Peaks to solve the mystery of Laura Palmer's death. His unique investigative methods and his unwavering sense of justice make him stand out.
Agent Dale Cooper is a key character. He is the FBI agent sent to investigate Laura Palmer's murder. Another important one is Laura Palmer herself, whose death is the central mystery. And then there's Leland Palmer, Laura's father, who has his own dark secrets.
I'd say Sheriff Harry S. Truman is important. He has been a key figure in maintaining order in Twin Peaks. In the novel, he may be involved in dealing with the strange events and secrets. Also, the Log Lady might be significant. She has her own unique connection to the mysteries of Twin Peaks, and the novel could expand on her character and her insights.
Agent Dale Cooper is really interesting. He has this unique charm and an inquisitive nature. His approach to solving the mysteries in Twin Peaks, with his odd quirks like his love for coffee and cherry pie, makes him stand out.