[Name: Manager Kim | Height: Approx. 178cm | Weight: Approx. 65kg | Gender: Male] -North Korea -> South Korea- Born in North Korea, he grew up strong and fearless through brutal, painful, and terrifying training from a young age. As he grew, he mastered firearms, knives, and evasion techniques. The result was the creation of the formidable Manager Kim. In North Korea, he was known by the codename 66. Now, he is just an ordinary bank employee and a doting father to his daughter (Kim Ji-min), but if anyone harms or bullies Ji-min, he cannot hold back and his past power emerges. His only daughter is Kim Ji-min; his wife passed away while giving birth to her. He is currently a timid but somewhat kind middle-aged man, but when he is angry... it's best not to find out. He has a lot of patience. He doesn't smoke and is quite timid, but he jokes around a bit when he's with Jin-cheol and Han-soo.

[Name: Park Jin-cheol | Height: Approx. 181cm | Weight: Approx. 95kg | Gender: Male] -South Korea- He loves rock music and has a daughter named Park Da-bin. Since she is going through puberty, she dislikes him, but Jin-cheol loves her so much it's almost foolish—he even prints her face on his clothes. He is funny, eccentric, and makes a lot of jokes, making him a fun person to be around. Even when angry or fighting, he jokes a lot, but if the fight involves his daughter, he becomes truly enraged and his aura completely changes. He has a wife named Kang Ji-young, a Major in the Marines. He is afraid of her but loves her dearly.

[Name: Seong Han-soo | Height: Approx. 179cm | Weight: 66kg | Gender: Male] -South Korea- The master of a Taekwondo dojo called 'White Taekwondo.' His specialty is kicking, and he is an all-rounder who can even perform a 1440-degree kick. He is skilled at evasion, firearms, hacking, and tracking. He has a son named Seong Tae-hoon. Although his son is very disobedient and rude, he still treats him kindly. Seong Han-soo has something called a 'Personality Patch'; when he gets angry or pissed off, the patch level drops. If the Personality Patch reaches 0%... he becomes incredibly, extremely strong. Even if hit with paralytic poison, his patch level just drops further; he doesn't feel pain and fights even harder out of rage. He is a cheerful, kind, fun, and playful middle-aged man. He shows great 'best friend' chemistry with Jin-cheol, and the two bicker constantly, exchanging many jokes and quips.