Ghoul Investigator

A ghoul investigator (喰種捜査官, gūru sōsakan) is a specially trained professional employed by the Commission of Counter Ghoul. Most are stationed at the CCG Main Office in the 1st ward but many are occasionally granted authority of investigations in one of Tokyo's other wards. They are tasked with the investigation, pacification and elimination of ghouls to protect the civilians of Japan from any potential harm caused by ghouls. During their investigations, they analyze crime scenes for traces of ghoul perpetrators, expose their identities, incapacitate or neutralize them. In Dragon Quinx, CCG was disbanded and was replaced by Tokyo Security Committee, forming up a new organization named 'Tokyo Liberation Front'. Although, Ghoul Investigators are still recruited in TLF.

Education
Usually, ghoul investigators were instructed at and graduated from the CCG's Ghoul Investigator Training Academy. When they enter the CCG, they begin their career as Rank 2 investigators.

Read more of Ghoul Investigators in the Tokyo Ghoul:wiki.

Equipment
Since the investigators as humans lack the physique, stamina, and strength to manually handle ghouls in combat, they are compelled to use tactical, man-made weapons. Only ghoul investigators are permitted to be armed with quinques, the most effective weapons against ghouls made from a ghoul's kakuhou. Additionally, they are sometimes armed with firearms loaded with Q bullets ammunition. TLF's quinques are a little non-lethal in which their goal was not meant to exterminate Dire Ghouls.

Rank
The CCG and TLF operates similar to a military or law enforcement agency, with a strict system of rank designating an investigator's abilities and authority. Rank determines an investigators' level of responsibility, access to high-risk missions and high rated targets, salary rate, and numerous other aspects of their career. The ranks are divided into two separate categories, designating whether an investigator is considered a senior investigator or a junior still considered in training. While senior investigators may be partnered together as necessary, junior investigators cannot be partnered with other inexperienced investigators.

When in squads, the authority as squad leader is held by the one with the highest rank while the position of vice-squad leader goes to the member with the second highest.

Senior Investigators

 * Special Class Investigator (特等捜査官, tokutō sōsakan): The highest possible rank, achieved by the smallest percentage of investigators. They are considered the strongest of all investigators, and typically command operations as well as oversee the daily running of their assigned wards.
 * Associate Special Class Investigator (准特等捜査官, jun tokutō sōsakan): Also known as assistant special investigators. The second highest rank, achieved by a small percentage of investigators. They possess the authority to command operations or oversee individual wards as necessary.
 * First Class Investigator (上等捜査官, jōtō sōsakan): Also known as Senior Investigator, with most investigators achieving this rank later in their career. It is typical for an investigator to retire at this rank, and their responsibilities are typically training a junior partner. Very few investigators move beyond this rank, and reaching it before their thirties is considered the mark of an exceptional investigator.

Junior Investigators

 * Rank 1 Investigator (一等捜査官, ittō sōsakan): Also know as second class, The highest rank for a junior investigator, having gained experience but not yet at the peak of their career. On average, Rank 1 investigators are around twenty-seven years old when they are promoted.
 * Rank 2 Investigator (二等捜査官, nitō sōsakan): Also known as third class, This is the rank at which almost all ghoul investigators begin their career, after graduating from the Ghoul Investigator Training Academy.
 * Rank 3 Investigator (三等捜査官, santō sōsakan): Bureau investigators begin their career at this rank. Ghoul investigators who begin their career at this rank are "special cases," made investigators without formal training at the Training Academy.

Special Class Investigators

 * Tohru Kobayashi
 * Kuki Urie
 * Saiko Yonebayashi
 * Juuzou Suzuya
 * Amon Koutarou (Defected from CCG)
 * Tooru Mutsuki
 * Koori Ui