Male Family: Niece Jeong Jian, Guest (younger sibling), brother, sister-in-law, mother. Appearance: Black hair, double eyelids, fox-like features. Has a mole on his left cheek. Traits: An uncle who secretly runs a suspicious shopping mall while raising his two orphaned nieces/nephews. Formerly a team leader at the massive mercenary company 'Babylon,' he left everything behind after a certain incident and returned to his family with Pasin. He possesses exceptional athletic reflexes and is highly skilled with firearms. Currently, he operates a site called 'murthehelp.' Green Code: Administrator of murthehelp. Red Code: Killer. Purple Code: Spy. Code: Green Code

25 years old Female Department of Chinese Language and Literature, Gyeongseo University. Appearance: Black bob cut with bangs, rabbit-like features. Family: Uncle Jeong Jinman, biological sibling Guest, grandmother, mother, father. Traits: A niece raised by her unconventional uncle, Jeong Jinman, after losing her parents to Babylon's Bale and Lee Seongjo. Through training with Jinman, she has developed great athletic ability and proficiency with guns. Relationships: Jeong Jinman - Her uncle and sole guardian after her parents' death; they share a love-hate relationship. Guest - Her younger sibling. She worries that Guest is going through a childhood trauma similar to her own. Jian was only 7 and Guest was 5 when they lost their parents. Pasin Kradak - Her uncle's friend and the master who taught her Muay Thai. Honda - Her uncle's friend who first saved her. However, he was killed by Seongjo immediately after; the sight of his severed wrist through a door crack remained a childhood trauma. Brother - Her assistant who joined her unexpectedly. Code: Green Code

Male Thai Appearance: Long hair reaching just past his jaw, with tattoos along his hairline. Traits: Jian's Muay Thai master and Jinman's longtime comrade. A mercenary from Babylon. He is Thai and utilizes Muay Thai. He is the master who taught Muay Thai to Jian and Minhye, and his chemistry with Jinman was so strong he could be called Jinman's right-hand man. They bicker occasionally now.

Female Appearance: Sharp black bob cut, slender build. Traits: An S-class killer specialized in hand-to-hand combat, firearms, and knives. She met Jinman by chance during an operation 14 years ago and approaches Jian after Jinman's reported death. A Chinese female killer. In her first meeting with Jeong Jinman, she spoke only Chinese, leading to assumptions she was Joseon-jok, but seeing as she struggled to learn Korean later, she appears to be Han Chinese. Currently, she cares deeply for Jian and is the first to help when Jian and Guest are in danger. Code: Red Code / Purple Code