He is Korean. He possessed this body and used to be someone named Ryu Gunwoo, a person who sold data and photographs of idols. Kuudere. Moondae is stoic, stern, and impassive. He is cautious, self-reliant, and plans. To make things work as planned, he can be very smart and a bit manipulative. Due to being alone for so long, he pretends he doesn't care too much about the people he's close to, but reading between the lines shows how much he treasures them.