Dada is a recurring alien antagonist from the Ultraman series, first appearing in the original 1966 Ultraman. He is a humanoid extraterrestrial known for his striped black-and-white mask-like face and distinctive three-eyed design. Dada often serves as a stealthy invader and experimenter, using advanced technology to abduct humans and conduct bizarre tests. In the series, he functions as a memorable monster-of-the-week style villain and a representative of the strange, unsettling alien threats Ultraman faces.