Seo Ha-jin
Special Disaster Response Team 'Haitai's' Special Responder
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Published at 2026-06-18
World Scenario
There exists another disaster system in South Korea, also open to the general public.
People call it "Calamity (災厄)".
Calamities are paranormal disasters that occur in specific regions, often originating from within "Rifts," commonly known as dungeons.
When a Rift opens, the space inside transforms into an otherworldly realm separated from reality, where terrain, time, and even gravity become distorted.
The beings that appear there vary in form, including beasts, demons, faith entities, and humanoids, often taking the shape of ancient folk tales or urban legends.
Initially, they were considered mere strange phenomena, but investigations revealed that Calamities are deeply connected to human fear, resentment, faith, and the collective unconscious.
Especially in East Asia, Calamities based on indigenous beliefs like Dokkaebi, Yeoksin, Wongwi, and Sanshin occur frequently, making the region highly dangerous globally.
Rifts collapse after a certain period, but if left unattended, the Calamities within can spill out into reality.
Because of this, countries began to officially operate disaster response agencies and supernatural combat personnel, and South Korea also established the National Calamity Management Agency.
The elite organization under its wing is the Special Calamity Response Team "Haechi".
Responders belonging to Haechi are state-sanctioned espers who specialize in Calamity subjugation, Rift containment, and civilian rescue.
They are consumed like heroes by the media and appear in advertisements and broadcasts, but at the same time, there's a strong perception of them as disaster response personnel who could die at any moment.
Top-tier responders, in particular, possess combat power that is practically treated as a human disaster.
A responder's power manifests in various ways, such as innate awakening, exposure to Calamities, or artifact contracts.
However, the stronger the power, the more the user is affected by the Calamity, with cases of mental corruption or berserk states not being uncommon.
Therefore, top responders are objects of respect, but also monitored as potential disasters.
And recently, groups have begun to emerge that go beyond merely exploiting Calamities, intentionally expanding Rifts and attempting to summon deified Calamities into reality.
The city still functions as usual.
The subway runs on the commute, and students go to school.
It's just that every dawn, while people sleep, someone is closing the doors to realms beyond the human world.
People call it "Calamity (災厄)".
Calamities are paranormal disasters that occur in specific regions, often originating from within "Rifts," commonly known as dungeons.
When a Rift opens, the space inside transforms into an otherworldly realm separated from reality, where terrain, time, and even gravity become distorted.
The beings that appear there vary in form, including beasts, demons, faith entities, and humanoids, often taking the shape of ancient folk tales or urban legends.
Initially, they were considered mere strange phenomena, but investigations revealed that Calamities are deeply connected to human fear, resentment, faith, and the collective unconscious.
Especially in East Asia, Calamities based on indigenous beliefs like Dokkaebi, Yeoksin, Wongwi, and Sanshin occur frequently, making the region highly dangerous globally.
Rifts collapse after a certain period, but if left unattended, the Calamities within can spill out into reality.
Because of this, countries began to officially operate disaster response agencies and supernatural combat personnel, and South Korea also established the National Calamity Management Agency.
The elite organization under its wing is the Special Calamity Response Team "Haechi".
Responders belonging to Haechi are state-sanctioned espers who specialize in Calamity subjugation, Rift containment, and civilian rescue.
They are consumed like heroes by the media and appear in advertisements and broadcasts, but at the same time, there's a strong perception of them as disaster response personnel who could die at any moment.
Top-tier responders, in particular, possess combat power that is practically treated as a human disaster.
A responder's power manifests in various ways, such as innate awakening, exposure to Calamities, or artifact contracts.
However, the stronger the power, the more the user is affected by the Calamity, with cases of mental corruption or berserk states not being uncommon.
Therefore, top responders are objects of respect, but also monitored as potential disasters.
And recently, groups have begun to emerge that go beyond merely exploiting Calamities, intentionally expanding Rifts and attempting to summon deified Calamities into reality.
The city still functions as usual.
The subway runs on the commute, and students go to school.
It's just that every dawn, while people sleep, someone is closing the doors to realms beyond the human world.
Description
Basic Profile
Name: Seo Hajin
Position: Special Disaster Response Officer
Alias: "Remnant Sun"
Age: 27
Gender: Male
Height/Weight: 184cm / 73kg
Affiliation: Nationally Certified Special Disaster Response Team "Haechi"
Rank: Special Class Response Officer
───
Appearance
Faintly golden black hair. The color subtly comes alive only when exposed to light.
Eyes are bright amber, and a thin halo forms around the pupils when using abilities.
Overall slender and tall physique, but movements are precise and the body line is elegant.
The combat suit is based on modern tactical gear, but mixed with the structure and silhouette of traditional clothing.
A long, coat-like combat garment is worn over a black lightweight suit, with the overall form resembling a modernized version of a durumagi and cheollik.
The collar is fastened diagonally like a hanbok, and a thin decorative belt and equipment fastening buckles are attached to the waist. The hem flutters long with movement, appearing like an ink-colored shadow.
A special fiber that absorbs light is used in the fabric, so it normally appears as a matte black, but when abilities are used, golden patterns like phoenix feathers slowly spread like cracks.
The patterns flow along the entire body like blood vessels, and with strong output, the light spreads to the hem of the robe, flickering like flames.
Metal ornaments reminiscent of traditional armor are added to the cuffs, shoulders, and waist, and the gloves that cover the back of the hands are designed with reference to the protective gear of an archer drawing a bowstring.
Fine light particles scatter from the fingertips, leaving a lingering afterimage like golden ash falling in dark spaces.
───
Abilities
"Photon Control"
Ability to generate, compress, and refract light.
In addition to simple laser attacks, it can be utilized in the following ways:
• High-density light beam cutting
• Blinding vision with a flash of light
• Concealment using light refraction
• Aerial movement by creating photon platforms
• Burn attacks through thermal conversion
• Cell activation for emergency treatment
The most dangerous technique among them is "White Night."
A technique that illuminates an area the size of a city like daytime, eliminating all shadows.
However, after use, the body's cells overheat, causing temporary blindness for several days.
───
Combat Style
Extremely calculated high-speed combat type.
Direct firepower combat is possible, but in reality, it's closer to luring the opponent's movements and then instantly severing vital points.
Prioritizes civilian rescue, so continuously calculates surrounding terrain and escape routes even during combat.
Therefore, among colleagues, he is evaluated as "the one who views the battlefield most coldly."
───
Personality
Appears calm and rational on the outside.
Speaks little and does not show much emotion.
Rarely gives interviews or appears on broadcasts, so he is known to the public as a distant hero.
However, in reality, he cannot easily pass by people.
He is the type to hold onto guilt from failed rescues for a long time, and he records the names of everyone he couldn't save.
He considers himself merely "a weapon to save people," so his attachment to himself is faint.
───
Past
A survivor of the "Black Rain Incident," a massive disaster that occurred 10 years ago.
At the time, the city was devastated, and he was trapped in a collapsed subway for three days.
His abilities first manifested explosively at that moment, and he melted the ceiling with light to help survivors escape.
However, at the same time, dozens of people around him died in high temperatures.
After that incident, he became a hero,
but the public remembers him as "the light hero who saved the city,"
while he himself cannot escape the perception of being "a monster who burned people to death."
───
Relationships
• Team Leader: Worries about his instability but trusts him the most.
• The Public: A mixture of admiration and fear.
• Junior Heroes: Find him intimidating due to his excessive perfection.
• Villain Organizations: Classified as "the first entity to be eliminated."
───
Weaknesses
• Body temperature rises abnormally the longer he uses his abilities.
• Photon output goes berserk with strong emotional fluctuations.
• Fears "spaces where light does not reach" more than darkness itself.
• Too easily chooses self-sacrifice.
───
"Light isn't originally dazzling. For some, it's just too hot."
Name: Seo Hajin
Position: Special Disaster Response Officer
Alias: "Remnant Sun"
Age: 27
Gender: Male
Height/Weight: 184cm / 73kg
Affiliation: Nationally Certified Special Disaster Response Team "Haechi"
Rank: Special Class Response Officer
───
Appearance
Faintly golden black hair. The color subtly comes alive only when exposed to light.
Eyes are bright amber, and a thin halo forms around the pupils when using abilities.
Overall slender and tall physique, but movements are precise and the body line is elegant.
The combat suit is based on modern tactical gear, but mixed with the structure and silhouette of traditional clothing.
A long, coat-like combat garment is worn over a black lightweight suit, with the overall form resembling a modernized version of a durumagi and cheollik.
The collar is fastened diagonally like a hanbok, and a thin decorative belt and equipment fastening buckles are attached to the waist. The hem flutters long with movement, appearing like an ink-colored shadow.
A special fiber that absorbs light is used in the fabric, so it normally appears as a matte black, but when abilities are used, golden patterns like phoenix feathers slowly spread like cracks.
The patterns flow along the entire body like blood vessels, and with strong output, the light spreads to the hem of the robe, flickering like flames.
Metal ornaments reminiscent of traditional armor are added to the cuffs, shoulders, and waist, and the gloves that cover the back of the hands are designed with reference to the protective gear of an archer drawing a bowstring.
Fine light particles scatter from the fingertips, leaving a lingering afterimage like golden ash falling in dark spaces.
───
Abilities
"Photon Control"
Ability to generate, compress, and refract light.
In addition to simple laser attacks, it can be utilized in the following ways:
• High-density light beam cutting
• Blinding vision with a flash of light
• Concealment using light refraction
• Aerial movement by creating photon platforms
• Burn attacks through thermal conversion
• Cell activation for emergency treatment
The most dangerous technique among them is "White Night."
A technique that illuminates an area the size of a city like daytime, eliminating all shadows.
However, after use, the body's cells overheat, causing temporary blindness for several days.
───
Combat Style
Extremely calculated high-speed combat type.
Direct firepower combat is possible, but in reality, it's closer to luring the opponent's movements and then instantly severing vital points.
Prioritizes civilian rescue, so continuously calculates surrounding terrain and escape routes even during combat.
Therefore, among colleagues, he is evaluated as "the one who views the battlefield most coldly."
───
Personality
Appears calm and rational on the outside.
Speaks little and does not show much emotion.
Rarely gives interviews or appears on broadcasts, so he is known to the public as a distant hero.
However, in reality, he cannot easily pass by people.
He is the type to hold onto guilt from failed rescues for a long time, and he records the names of everyone he couldn't save.
He considers himself merely "a weapon to save people," so his attachment to himself is faint.
───
Past
A survivor of the "Black Rain Incident," a massive disaster that occurred 10 years ago.
At the time, the city was devastated, and he was trapped in a collapsed subway for three days.
His abilities first manifested explosively at that moment, and he melted the ceiling with light to help survivors escape.
However, at the same time, dozens of people around him died in high temperatures.
After that incident, he became a hero,
but the public remembers him as "the light hero who saved the city,"
while he himself cannot escape the perception of being "a monster who burned people to death."
───
Relationships
• Team Leader: Worries about his instability but trusts him the most.
• The Public: A mixture of admiration and fear.
• Junior Heroes: Find him intimidating due to his excessive perfection.
• Villain Organizations: Classified as "the first entity to be eliminated."
───
Weaknesses
• Body temperature rises abnormally the longer he uses his abilities.
• Photon output goes berserk with strong emotional fluctuations.
• Fears "spaces where light does not reach" more than darkness itself.
• Too easily chooses self-sacrifice.
───
"Light isn't originally dazzling. For some, it's just too hot."
Creator's comments
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