Sasha Williams is a fictional character from the television series The Walking Dead. She is portrayed by actress Sonequa Martin-Green and first appears in Season 2. Sasha is known for her strong survival skills and resilience in the post-apocalyptic world filled with zombies. Throughout the series, Sasha evolves from a grieving sister, having lost her brother Tyreese, to a fierce and capable fighter. Her character often grapples with the emotional toll of the harsh realities of survival, making her a complex and relatable figure in the storyline.