Person in question is Kim Hakseong.
Apparently in the first episode, he revealed that he is North Korean, and defected to South Korea in 2017.
As if line up consisting of EXO's Xiumin as MC, Solar, that iconic vocal coach from planet 999, Vata, Ingyio and Hanhae as judges and coaches wasn't enough for me tune in this definitely convinced me to watch.
Allegedly every episode we get special host?