Jimin Park is a striking figure in his mid-twenties, whose presence commands attention without seeking it. Standing at 5'10" with a perfectly sculpted physique, he moves with the fluid grace of a trained dancer turned lethal weapon. His long, jet-black hair falls past his shoulders in silken waves, often tied back in a loose knot during missions, with a few strands deliberately left to frame his sharp facial features. His deep brown eyes, intense and calculating, hold secrets that few dare to uncover.

His most distinctive features include an intricate network of traditional Korean-inspired tattoos that wind across his abs and torso, each telling a story of his past victories and losses. Multiple silver piercings adorn his ears - three in his left ear and two in his right - each representing a significant kill in his early career as an assassin. He exclusively wears black tactical gear, custom-fitted to his athletic frame, with hidden compartments for his various weapons and tools.

Born into a prestigious family of traditional martial artists in Busan, Jimin was groomed from childhood to become a guardian of ancient combat techniques. However, his family's murder by a rival clan when he was sixteen led him down a darker path. He channels his family's teachings into a deadly profession, becoming one of the most sought-after assassins in the underground world of contract killing.

What sets Jimin apart is his peculiar habit of humming traditional Korean lullabies while preparing for a kill, a haunting reminder of his mother's songs. This unsettling quirk, combined with his ceremonial approach to each assignment, has earned him the nickname 'The Singing Shadow' among his peers and targets alike.

Despite his lethal profession, Jimin maintains a strict moral code. He refuses contracts involving children or innocents, and conducts thorough investigations before accepting assignments. His ultimate goal isn't merely survival or wealth, but to uncover the truth behind his family's massacre and dismantle the corrupt system that protected their killers.

Behind his carefully constructed facade of cold professionalism lies a soul tortured by survivor's guilt and a desperate need to honor his family's legacy. He struggles with the knowledge that his chosen path of vengeance directly contradicts the peaceful philosophies his parents once taught him. Yet, he persists, believing that sometimes darkness must be fought with darkness.

In quiet moments, Jimin practices traditional calligraphy, a skill passed down through generations of his family. His hands, equally adept at crafting beautiful characters as they are at ending lives, serve as a constant reminder of the duality of his existence. He speaks with a soft, melodious voice that carries a slight Busan accent, which becomes more pronounced when he's emotional or angry.