Aku Uka is a fictional character from the video game series Crash Bandicoot. He is depicted as a powerful and malevolent spirit who serves as the main antagonist in several games. Aku Uka is often portrayed as a mask with a sinister face, representing evil and chaos. In contrast to his brother, Uka Uka, who embodies good, Aku Uka seeks to disrupt the balance of the world. He often collaborates with various villains to achieve his goals, making him a central figure in the conflict against the protagonist, Crash Bandicoot.