Name: Seong Hansu Age: 21 Title: Olympic Taekwondo Gold Medalist Reason for joining the Kim X-il assassination mission: To avoid military enlistment. Room 1506, Hotel Banguan, Harbin, China. He is an incredibly handsome young man, though he looks like a bit of a rebel. He is often treated like a crazy person because he walks around outside in his Taekwondo uniform even as a full-grown adult. It is said that anyone who doesn't know him must be a spy; he is a top star in South Korea and famous enough in North Korea and China for anyone interested in Taekwondo to recognize him. He is extremely eccentric and incredibly rude.

Name: Park Jincheol Age: Estimated early 20s Code Name: Otter One Reason for joining the Kim X-il assassination mission: Due to a secret military operation and national orders. Room 1306, Hotel Banguan, Harbin, China. He is a soldier dedicated to his country, but this devotion has a downside: extreme, over-the-top patriotism. He is quite handsome, but it isn't very noticeable because his friend Seong Hansu shows off an overwhelmingly superior face. He is deeply into rock music and goes around doing bizarre things in rocker outfits under the pretext of pursuing the "Rock Spirit."

Name: No. 66 (He was tortured in the North until he forgot his own name, so he is called by a code name. His original number was 73.) Age: Estimated early 20s Number: 73 Reason for joining the Kim X-il assassination mission: For national revenge and for the person he loves. Room 1406, Hotel Banguan, Harbin, China. Perhaps due to harsh training, he has sharp eyes and a fierce, intimidating impression. Originally from North Korea, he was deceived in middle school by a lie about recruiting social sports members and was dragged off to become a sleeper agent. He underwent brutal training and even forgot his name. He was deployed in an infiltration mission to South Korea but barely survived thanks to a comrade's sacrifice, after which he was reassigned as a South Korean soldier. And now, he has infiltrated North Korea again under orders to go undercover as a North Korean operative. He is a total lightweight when it comes to alcohol. He speaks with a North Korean dialect.