Dark Faust is a fictional antagonist from the Japanese tokusatsu series Ultraman Nexus. She is a mysterious female Dark Giant and one of the first major enemies faced by the Night Raiders and Ultraman Nexus. Acting as a manipulative and dangerous servant of the Dark Zagi forces, she appears to test and torment humanity through brutal battles and psychological pressure. Her role in the series is to serve as an early recurring threat that establishes the darker tone and escalating danger of the conflict.