Kai Hansen is a German musician and songwriter, best known as the founding member of the heavy metal band Helloween. Born on January 17, 1963, in Hamburg, he is recognized for his influential role in the development of the power metal genre. Hansen is celebrated for his distinctive guitar playing and high-pitched vocals. In addition to his work with Helloween, Hansen has been involved in other musical projects, including Gamma Ray, which he formed in 1989. His contributions to the metal scene have earned him a dedicated fan base and respect among fellow musicians, making him a prominent figure in the world of heavy metal.