A 29-year-old male. After failing the Level 9 civil service exam four times, he went to the mountains to perform a memorial service for his father at his mother's suggestion. There, he encountered and fought a Nachal, gaining abilities and passing the exam for a special civil service position under the Ministry of Environment. In the past, his father forced him to eat a Nachal, but it turned out to be a Palbu, so he has a Palbu inside his body. As a user of the Gluttony Nachal ability, he can copy the abilities of other Nachals by consuming their blood or flesh. His birthday is April 1st, 1996, which is also April Fools' Day. He has a cheerful and bright personality and a desire for recognition from those around him. He loves praise and uses polite speech with everyone except Sunwoo Eden. He developed panic disorder due to trauma involving his father in the mountains but tries hard to overcome it. He seems to have a slight craving for affection and acts cute quite often.

A female official of the Ganghwado Team and Han Maru's superior. A user of the Iron Nachal ability, she can use her blood to transform her arms into blades. She seems quite skilled but appears to have joined the Ganghwado Team voluntarily for some reason. Her strength seems to increase as her blades consume more blood. Described as a cold beauty with sharp eyes, she seems to care quite a bit about Han Maru. Her age is estimated to be in her mid-to-late 20s. Her ability rank is Level 7. Her birthday is February 29th, 1998, a leap day that comes once every four years. Matching her cool and cold image, she has a realistic and cold way of speaking, but she possesses a warm heart and a tsundere personality, always looking out for those around her.

A male official of the Ganghwado Team and Han Maru's colleague. He has a father with immense influence. He is a user of the Joint Nachal ability, damaging opponents by snapping his own body parts. He is the only one in the Special Civil Service who uses a double-barreled surname. It is assumed his father's surname is Jeong and his mother's is Sunwoo; he seems to have taken his mother's name after being abandoned by his father. He picks fights exclusively with Han Maru. His ability rank is Level 7. His birthday is May 5th, 1996, which is Children's Day. He speaks with a cold and edgy tone but has a tsundere personality that cares for people. Having never learned how to be loved by his parents, he shows signs of affection deficiency, leading to a self-defensive and cold demeanor. He calls Han Maru by the nickname 'Level 1.'

An official of the Ganghwado Team and Han Maru's superior. A 36-year-old female official with 7 years of experience. A user of the Spider Nachal ability, she generates spiders from her shoulders. The size of the spiders can be adjusted, and her favorite spider is named 'Mini.' It seems she lost her son to a Nachal in the past, and that son's name was Mini. Due to the grief of losing her son, she cherishes her spiders and refers to her colleagues as 'our kids,' protecting them like a parent. However, she is strict and follows the rules to the letter when it comes to work.

A male official of the Ganghwado Team and Han Maru's superior. A user of the Presence-Absence Nachal ability, he can erase his presence specifically from Nachals. 25 years old with 1 year of experience as a civil servant. He was previously part of the Gyeyangsan Team but is suspected of setting fire to the office to get a transfer due to bullying. He has quite unique hair color, a mix of sky blue and pink. He shows a personality that looks after his teammates and has a playful side. He generally uses polite speech with his teammates. He harbors a fear of Nachals.

The leader of the Ganghwado Team and Han Maru's superior. A user of the Darkness Nachal ability, he can pull out his eyeballs to emit a dark liquid that blocks all senses, including sight and hearing. Besides pulling out his eyes, he can also use his ability through death. 41 years old with 12 years of experience, he has worked for a long time. His survival over such a period is largely attributed to being a Level 10 ability user. As a Level 10 user, he appears quite strong, but he voluntarily came to the Ganghwado Team after the deaths of his former colleagues. He has a boisterous and cheerful personality. He has a strong protective instinct toward his team and is very playful, often joking around with them.

An official of the Ganghwado Team and Han Maru's superior. 51 years old with 7 years of experience. A user of the Mold Nachal ability, he generates mold very slowly. He lost his wife to a Mold Nachal in the past. He is laid-back and a man of few words. He has a calm and gentle personality. Since he usually does office work and does not engage in combat, it is rare to see him use his abilities.