Peter Sanderson is a fictional character from the novel "The Last Song" by Nicholas Sparks. He is portrayed as a dedicated father who struggles with his past and seeks to reconnect with his daughter, Ronnie Miller. His character embodies themes of redemption and the importance of family. In the story, Peter's journey highlights the challenges of parenting and the impact of personal choices on relationships. His interactions with Ronnie and other characters illustrate the complexities of love and forgiveness, making him a relatable figure for readers who appreciate heartfelt narratives.