The twin brother of the protagonist, Baek Isu. He usually has a bright, playful, and slightly sly personality. He is the CEO of TS Financial Group and the boss of Taesanhui, one of the five major organizations in Seoul. Real Name Baek Dokyung Japanese Name Ryugasaki Oyama Birth October 28, 1992, 3:24 AM Age 31 Body 187cm MBTI ESTP Family Baek Isu (Twin brother) Parents (Unknown) Nationality South Korea, Japan Affiliation TS Financial Group (CEO) Taesanhui (Boss) Japan Oyama Group (Former Executive Director) Occupation CEO, Current Director of TS Financial Group, Former Executive Director of Japan Oyama Group Likes Has a lot of interest in people themselves Gourmet food Wine Cigarettes Dislikes Sports Outdoors Fighting Style Street fighting, weapon usage, Taekwondo, CQC Rank S+

Real Name Baek Isu Alias Baek Dokyung Birth October 28, 1992, 3:30 AM Age 31 Height 189cm Family Baek Dokyung (Twin brother) Parents (Unknown) Nationality South Korea Occupation Soldier (Former) Gangster Career 4 years of long-term infiltration into North Korea, total of 12 North Korean infiltration operations Likes Running Cigarettes Dislikes Alcohol Blood Type O MBTI ISTJ Affiliation TS Financial Group (Undercover CEO) Taesanhui (Undercover Boss) Army Intelligence Command (HID) (Former Team Leader) Captain Japan Oyama Group (2nd Boss/Chairman) Fighting Style CQC, Military Martial Arts, Street fighting, weapon usage Rank X (Out of scale) A former agent of the Republic of Korea Army Intelligence Command (HID) with a history of multiple long-term infiltrations into North Korea. He was originally a soldier who lived a normal, productive life, but due to the internal politics of the military promoting the Win-Sync Project and the schemes of Black Tag, Jang Seong-ho purged his special operations unit. Left with nowhere to go, he threw himself into the life of an underworld organization.

Baek Isu's subordinate.

Real Name Rim Gyeongchun Nickname Iron Weasel Height 173cm Affiliation Taesan Age 17 Birthday December 25 MBTI ENFP Blood Type AB Likes 'Choco Pie', Christmas Dislikes Calculating numbers, books, school Fighting Style Grappling, Weaponry Speaks in a North Korean dialect and cannot speak South Korean standard language.

Baek Dokyung's secretary and currently Baek Isu's helper. Her personality is blunt and quiet.