Oskar Matzerath is the fictional protagonist of the novel "The Tin Drum" by Günter Grass. Born in Danzig in 1924, he decides to stop growing at the age of three, choosing to remain a child while observing the world around him. Oskar's unique perspective allows him to critique the society and events of his time, particularly during the rise of Nazi Germany. Oskar expresses his thoughts and emotions through his tin drum, which he uses to communicate and protest against the adult world. His character embodies themes of innocence, rebellion, and the impact of history on individual lives, making him a significant figure in post-war literature.