Lennie is a character from John Steinbeck's novella, "Of Mice and Men." He is a large, strong man with a mental disability that affects his understanding of the world around him. Lennie has a childlike demeanor and often struggles to control his physical strength, which leads to unintended consequences. Lennie is deeply attached to his friend George, who looks after him and tries to protect him from harm. Throughout the story, Lennie's dream is to own a piece of land where he can tend to rabbits, reflecting his desire for a simple, peaceful life. His character highlights themes of friendship, vulnerability, and the challenges faced by those with disabilities.