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Black Diamant

Summary:

BLACK DIAMANT [Executive Protection Syndicate]
A private elite protection agency that officially markets itself as a “high-risk executive security firm,” but in reality, governments, conglomerates, royalty, and underground organizations quietly compete to hire them.

Their slogan:
“If DIAMANT takes the contract, the target survives.”

The six bodyguards are known internally as The Hex, the most expensive and terrifying protection unit in the world. They almost never work together anymore because each one alone is considered enough to neutralize a crisis. Putting two on one client already signals danger. All six together means war-level threat.

Each bodyguard has a specialty:
Tactical combat
Intelligence
Cyber warfare
Psychological profiling
Extraction
Counter-assassination

The public thinks they’re mythologized rumors because no official records of them exist.

Notes:

Ayo! I’ve been working on a brand-new full-length AU these past few days—not a series this time. I’ve been deep into planning everything: the ideas, the plot, the characters, and how everything will unfold. So technically… it’s still in the making. This is just a little teaser. HAHAHA.

It actually started as a simple bodyguard AU idea (that was the original concept), but of course, I had to challenge myself and make things more complicated. 😆 Now it’s turned into something much bigger—leaning into crime, investigation, and action. As someone who loves that genre, I really hope I can pull this off.

So stay tuned, lovies! It might take some time… or who knows, I might suddenly drop it sooner than expected. For now, get to know the characters and their backgrounds. 💖

(See the end of the work for more notes.)

Chapter 1: Case Files — Character Overview

Chapter Text

 

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THE SIX ELITE BODYGUARDS or also known as THE HEX

 

1.THE WAR GHOST

Name: Choi Seungcheol

Background:

  • Former Marine Force Recon operative
  • Sent on black-ops missions in unstable war zones
  • Sole survivor of an ambushed extraction unit
  • Earned the nickname “Ghost” because enemies never realized he was there until everyone was already dead
  • Left the military after refusing an order that sacrificed civilians

Specialty:

  • Close-quarter combat
  • Tactical evacuations
  • Military strategy
  • Human shield protection
  • Extraction

Personality:

Cold, disciplined, emotionally detached on the surface. But hyper-observant toward vulnerable people.

 

Client: Yoon Jeonghan

Background:

  • President’s second son
  • Socialite
  • Charity ambassador
  • Diplomatic representative for youth programs.

Unofficially, everyone assumes he’ll eventually enter politics whether he wants to or not. He grew up constantly watched, heavily guarded, politically weaponized by the media.

 

The Need for Protection:

  • A presidential convoy was attacked. Encrypted threats began naming Jeonghan specifically.
    And, worst of all, internal Blue House movement routes were leaked.

The terrifying part?
The attacks weren’t random—they were coordinated by someone with military-level intelligence access. Which is exactly why DIAMANT deploys Seungcheol.

Years ago, Seungcheol served in a classified operation alongside Jeonghan’s older brother—the president’s first son. He never made it back alive. Official reports labeled it a “combat loss" but Seungcheol knows better. It wasn’t combat. It was betrayal.

And now, the same forces behind that incident may be targeting Yoon Jeonghan.

 

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2.THE SMILE KILLER

Name: Lee Seokmin

Background:

  • Former international spy recruited as a teenager
  • Specialized in infiltration and seduction operations
  • Disappeared after eliminating his own handler
  • Rumored to speak seven languages fluently

Specialty:

  • Intelligence gathering
  • Undercover operations
  • Psychological manipulation
  • Assassination prevention

Personality:

Charming, playful, impossible to read. Constantly smiling even during violence.

 

Client: Hong Jisoo

Background:

  • A world-famous actor
  • Award-winning celebrity with political influence due to humanitarian activism.

The Need for Protection:

  • Obsessive stalker network
  • Deepfake scandals
  • Hidden trafficking ring targeting celebrities
  • The actor witnessed something during a private elite party

 

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3.THE MACHINE

Name: Kim Mingyu

Background:

  • Former cyber warfare prodigy recruited by national intelligence
  • Designed surveillance systems governments still secretly use
  • Became a fugitive after exposing illegal mass monitoring
  • Hasn’t legally existed for eight years

Specialty:

  • Cybersecurity
  • Digital tracking
  • Drone surveillance
  • Information warfare

Personality:

Socially awkward, brutally honest, sleep-deprived genius. Hates physical touch but becomes overprotective.

 

Client: Jeon Wonwoo

Background:

  • A tech company heir
  • Young CEO inheriting one of the largest AI corporations in Asia.

The Need for Protection:

  • Corporate espionage
  • Internal coup attempts
  • Someone is trying to frame the heir for a massive data breach

 

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4.THE REAPER

Name: Kwon Soonyoung

Background:

  • Former underground mercenary
  • Raised in organized crime circles
  • Became infamous for surviving impossible contracts
  • DIAMANT recruited him directly instead of arresting him

Specialty:

  • Counter-assassination
  • Weapons mastery
  • Threat elimination
  • Underworld negotiations

Personality:

Intimidating, blunt, violent reputation — but unexpectedly gentle with his clients.

 

Client: Lee Jihoon

Background:

  • Internationally renowned classical pianist whose family controls a massive financial empire.

The Need for Protection:

  • Kidnapping attempts
  • Family inheritance war
  • Anonymous threats after refusing arranged marriage deals
  • Mafia connections surrounding the family

 

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5.THE SAINT

Name: Chwe Hansol

Background:

  • Former combat medic from international humanitarian missions
  • Worked in epidemic zones and civil conflicts
  • Lost his medical license after exposing pharmaceutical corruption
  • Known for keeping people alive against impossible odds

Specialty:

  • Emergency medicine
  • Crisis management
  • Trauma psychology
  • Poison detection

Personality:

Calm, kind, emotionally intelligent. The “safe” one — which makes him dangerous because people underestimate him.

 

Client: Boo Seungkwan

Background:

  • A controversial idol group leader of the biggest global K-pop group.

The Need for Protection:

  • Extreme sasaeng harassment and torture-like stalking behavior
  • Industry sabotage orchestrated behind the scenes
  • Manufactured drug scandals by rival competitors
  • Collapsing mental health due to relentless public pressure

 

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6.THE HUNTER

Name: Wen Junhui

Background:

  • Former Interpol fugitive tracker
  • Specialized in hunting organized crime leaders across borders
  • Became infamous for never losing a target
  • Left after political interference caused civilian casualties

Specialty:

  • Tracking
  • Interrogation
  • Escape prediction
  • Long-range combat

Personality:

Quiet, intimidating, hyper-focused. Has difficulty separating work from personal attachment.

 

Client: Xu Minghao

Background:

  • Award-winning investigative journalist exposing elite trafficking networks and political corruption.

The Need for Protection:

  • Multiple murder attempts
  • Their sources keep disappearing
  • International criminal organizations are hunting them

 

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7.THE SUPREMUS

Name: Lee Chan

Background:

  • Not part of The Hex but he's the man behind Black Diamant’s operations
  • Publicly known as the executive director of Aurum Executive Security Firm
  • Built a legitimate empire while secretly establishing Black Diamant as a parallel, covert authority
  • Handpicked and recruited every member of The Hex based on psychological profiling and combat efficiency
  • Operates beyond corporate, military, and political boundaries through a network of classified alliances

Specialty:

  • Strategic command and multi-layered operations
  • Psychological profiling and manipulation
  • Intelligence synthesis and threat prediction
  • High-level negotiation and crisis control
  • System-wide coordination and execution

Personality:

Beneath the composure lies a mind that is always several steps ahead, observing, calculating, and deciding outcomes long before others realize there is a game being played.

 

 

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To receive one of THE HEX, either DIAMANT chooses for you, governments intervene, or someone powerful pulls impossible strings.

Which means getting one of the six is terrifying because it means: “The threat against you is catastrophic.”