Marina Singh is a fictional character from the novel "State of Wonder" by author Ann Patchett. She is a pharmacologist who works for a pharmaceutical company and is sent on a mission to the Amazon rainforest to find her missing colleague, Dr. Anders Eckman. Marina's journey explores themes of science, ethics, and the complexities of human relationships. Throughout the story, Marina grapples with her own fears and moral dilemmas while encountering the indigenous tribe, the Lakashi, and their unique practices. Her experiences challenge her understanding of life, death, and the impact of modern medicine on traditional cultures.