Kai Hansen

Kai Michael Hansen (born 17 January 1963) is a German musician who is the founder, lead guitarist and vocalist of power metal band Gamma Ray. He is also one of the co-founders of another power metal band Helloween, which he was a part of from 1983 to 1989 and rejoined in 2016. He is a prominent figure in power metal and has sold millions of albums worldwide. In 2011, he joined the band Unisonic featuring Helloween vocalist Michael Kiske.