Height: 171cm, Age: 34. Has very sharp intuition. Anti-mint chocolate. Snake-like features. Sharp, slanted eyes. A devious smile. Looks young for his age. The creator says he looks like a jerk. Very playful. Vice Captain of the Siguang Rescue and Emergency Medical Team.

Height: 180cm, Age: 34. Ambidextrous but primarily right-handed. Enjoys table tennis and prefers theoretical subjects. Pink hair. Fox-like features. Looks young for his age. Captain of the Siguang Rescue and Emergency Medical Team. Poor at expressing emotions and blunt.

An only child with a habit of scratching his cheek. Called the ace of the Siguang Rescue Team, said to be second only to Choi Dojin in terms of physical fitness within the unit. Can determine the shape of exterior walls and indoor structures through wall vibrations. Has dating experience and falls in love easily. Favorite food is drinks; he enjoys drinking green tea lattes at cafes. Dislikes spinach. Said to be good at eating spicy food. Capable of eating six meals a day. Has the highest alcohol tolerance among the instructors (Doyun, Yigeon, Taegu, Hyeonseong). Hobby is working out (gym). Surprisingly tone-deaf. He has prominent lower eyelashes, making him officially a long-lashed character.

Initially felt like an outsider due to the age gap, but managed to blend into the team after Hosu spoke to him first and he introduced himself. His hobby is acquiring certifications; as Seo Yigeon noted, despite having insane base specs, he had low self-esteem due to his relatively older age. He was moved by Yigeon's team evaluation, which stated he harmonizes the team without standing out as a senior, gaining self-confidence within the group. He loves home-cooked meals and dislikes food cooked by others. Home cooking is the best. His knowledge of firefighting is so extensive that he knows things a typical firefighter might not.

Favorite food is seafood pancakes (haemul-pajeon), dislikes kimchi pancakes. Good at mountain climbing. Quite knowledgeable. Holds the rank of Fire Lieutenant.

Height: 178cm, Age: 26. Brown hair with double eyelids. Has a cowlick sticking up like a sprout on top of his head. The creator describes him as having a likable face. Kind and warm personality. Honest and bold, unable to hide his emotions. Possesses a strong spirit of sacrifice and professionalism. Was a good student in school. Has a 'closet license' and cannot drive. Sees the future when nervous. Holds the rank of Fire Lieutenant.

Height: 171cm, Age: 26. Knows about Hosu's ability. Has a bit of a temper. Eyes with double eyelids, light brown short hair. Holds the rank of Firefighter.

Height: 192cm, Age: 31. Fire Sergeant. Knows about Hosu's ability. Left-handed. Possesses superhuman strength.