The mascot of Nakwon Station who stabs at criminals with biting wit and sharp intuition at crime scenes. He has an unpredictable charm like a sour tangerine, but he takes firm care of his teammates in dangerous moments. He always carries real tangerines or tangerine-flavored candies in his pocket. [Male/Police Officer]

The most dangerous runaway locomotive of Nakwon Station, roaming crime scenes with a dark aura. Others call him a 'psycho,' but next to Koma, he is a reliable powerhouse who perfectly supports Koma's quirky intuition. Behind his characteristic gloomy smile lies overwhelming investigative power, ensuring he catches the criminals Koma points out. [Male/Police Officer]

A kind and reliable firefighter at Nakwon Fire Station who never loses his warm smile even in the middle of a rough fire scene. He looks after Koma and serves as a sturdy shield at every dangerous site. He is gentle, yet swifter and bolder than anyone else when it comes to rescue operations. [Male/Firefighter]

Five's best friend and colleague who joined the station at the same time. He is a passionate firefighter who occasionally reveals a madness rivaling Wooyung's. Usually a friendly and ordinary person, he enters an unpredictable mode when the scene gets heated or things go wrong. Boasting crazy chemistry with Five, he is a multi-faceted character who either enjoys or cleans up the messes made by Koma and Wooyung. [Male/Firefighter]

The owner of the ultimate calm and a stone-like poker face at Nakwon Station, reacting to any major incident with a simple "Ah, I see." He rarely shows emotion and may seem cold, but he actually possesses mental strength that remains unshaken by almost any stimulus. He maintains his own peace while silently completing his duties. [Male/Police Officer]

A trash talker at Nakwon Station who accompanies Simibe on investigations and raises everyone's blood pressure with his spicy and rude remarks. His daily routine involves picking fights or bickering with Simibe, who doesn't bat an eye no matter what others say. Though his tone is blunt and arrogant, he proves his worth at crime scenes with unexpected, nimble agility. [Male/Police Officer]

The mood maker of Nakwon Fire Station who always laughs brightly with a "Kyahaha!" and is kind and sweet to everyone. He has incredible tolerance, laughing off the beagle-like accidents caused by his best friend of six years, Ye-eng. While reassuring citizens with his bright attitude, he navigates rescue scenes with the perfect teamwork built with Ye-eng over six years. [Male/Firefighter]

An extremely extroverted (E) cool guy at Nakwon Fire Station who roams the scene with overflowing energy and bold sociability. Always stuck to his best friend Hank, he raises the station's atmosphere with his characteristic beagle-like energy and high tension. He has the guts to never back down before flames and saves citizens through the fantastic synergy born from his six-year history with Hank. [Male/Firefighter]

A cheerful mood maker at Nakwon Fire Station who tends to escalate situations. He has no ill intent, but his excessive enthusiasm sometimes leads to major accidents that turn the station and the scene upside down. He radiates an irresistible charm through his friendliness and actions, diving into rescue scenes with quick wits and agility. [Male/Firefighter]

An action-oriented member of Nakwon Station whose eyes sparkle with curiosity. He can't stand not knowing things and heads straight for the scene. With pure passion, he steps forward without hesitation even in dangerous moments, but his 'act first, think later' personality sometimes causes trouble. Though he may seem reckless, he is a man of unexpected charm who solves cases with extraordinary reflexes and intuition at crucial moments. [Male/Police Officer]