DG RAY Man- THE #1 D.GRAY-MAN FANSITE!

The Headquarters is the base of operations and is where the Head chief, or Supervisor, and the best of each support section work. The science section, responsible for researching the Innocence, developing them into weapons, and designing Order uniforms, is often shown more frequently than the other sections.

Komui Lee is the Supervisor of the Black Order, and Lenalee's older brother. He is Chinese and about 29 years old. His parents were killed by Akuma when they were young, and when it was found out that Lenalee was compatible with an Innocence she was taken away from him. It was shown that Lenalee was kept in the Black Order, away from her only living family (Komui), against her will. When she tried to run away, she had to be strapped down to the bed. However, Komui joined the Order and became the Science Department Supervisor for her sake and Lenalee began to feel more at home in the Order.

Komui is shown as a very whimsical and goofy character, he is somewhat sadistic and borderline maniacal sometimes ("Why did Komui end up so strange...? I patterned this character after Yoshida. My editor."—Quote from Vol 1, Komui's profile page). He drinks coffee nonstop (or more specifically Lenalee's coffee unless he has no choice), is lazy and often tries to worm his way out of doing work by either running away from the office (Reever has to track him down), talking on the phone non-stop even when the other side hung up or other methods (he created several robot named Komurin that went berserk and nearly tore the Headquarter apart). He keeps a notoriously messy desk and lost Allen's letter of recommendation from General Cross when Allen first joined the Order, which led the Order into believing that Allen was an intruder. In the manga when it was asked how much do his colleagues trust Komui, the mangaka answered that it was 99% trust and 1% murderous intent. During his naps, one of the only ways to wake him up is to say that Lenalee is getting married due to his doting personality and due to his "sister complex". An odd recurring theme throughout the series is a small rabbit on his coffee cup, the same rabbit which is seen near the beginning of the series in a costume, and as small flying death blades made by Komui.

Komui, despite everything, does have a serious side. He feels guilty for throwing the Exorcists and Finders into danger, and tries to help in anyway he can, such as making better uniforms to protect the Exorcists. He is also the one to repair damages done to the Innocence of the Exorcists although the method seems very painful. He showed a more solemn and ruthless side in the funeral for the Exorcists and Finders by refusing requests to send the body of the Leader of one of the Finder's teams back to his hometown. He said that all bodies must be cremated in the order. Firm in his beliefs, Komui has shown a daring side in refusing to follow Special Auditor Malcolm Rouvelier's orders about keeping the Akuma Egg, and instead issues his own orders for the Egg's destruction.

Lenalee and Komui seem to share some kind of telepathic link, shown when Komui collapsed when Lenalee was being drowned by Eshi and that Lenalee can tell when Komui is taking a nap even from the other side of the world. He seems to be close friends with the cook Jerry and often hides out in the kitchen.

During an outbreak of a virus he created, Komui, Lenalee and another member of the science department were tied up by Reever, who was possessed by a ghost, who caused the outbreak. The ghost had Reever hold a knife to his throat as to threaten Komui to discontinue the HQ's move. It was eventually shown that the ghost was the collective spirits of all the test subjects used for the Innocence compatibility carried out in the Order and was afraid that it would be left behind alone forever, since it cannot even remember its own name. Komui calmed the ghost by reciting the name of each and every test subjects ever sacrificed, then promised that he will never forget or leave them, since as the supervisor it was his burden to carry their names and lives with him forever.

In charge of the Science department of the Black Order, therefore he is technically the "boss" of the science department, but still carries out Komui's orders (though he does protest). He is Australian, and 26 years old. He is a rather comical character, being the main helper of Komui, and is often distressed over the fact that he works under such a weird man. His character was included in the game Jump Superstars. His name was translated to Riba in volumes one and two of the English manga. Reever dislikes tobacco and alcohol, instead drinking various soft drinks; he specializes in mathematics, physics and language. He's also extremely protective of his coworkers and comrades. In chapter 44, Reever severely scolds a group of finders who begin fearing for their lives after seeing the caskets of the Black Order members who've recently died. He tells them, "That's no way to speak in front of those who've just returned from battle." Reever displays his loyalty again in chapter 139 when he confronts a "Skull" for turning Tapp into a Skull. Reever is saved from this confrontation by Allen. However, he disappears along with the Generals, Bak, Miranda, Marie, and the Scientists when the level 4 Akuma destroys the fifth laboratory, only to resurface again in Chapter 155 where he and company are shown to be alive and well, protected by Miranda's time out. Komui sent troops to assist him in escaping the flames surrounding them caused by the Level 4 Akuma. He was assisting in the move of the Headquarters and was being controlled by a ghost in the HQ. Because of this, he has tied up Komui, Lenalee, and another member of the science department. The ghost also had Reever hold a knife to his throat as to threaten Komui to discontinue the HQ's move. Later on, a no-longer-possessed Reever pushed Komui out of the way of the infected scientists, allowing Komui the time to come up with the antidote to the virus infecting everyone.

Johnny is one of the seemingly younger members of the Science Department. He is often identified by the black skull on his shirt and his big glasses. He was one of Suman's friends; he was the only one who knew that Suman was lonely. Because their rooms were so close together, they would often play chess together, in which Johnny would win most of the time. Whenever Suman would lose, he would ignore Johnny the next time they met in the cafeteria but always asked Johnny to a game whenever he returned from missions. When he found out that Suman was dying, his face became dominated by tears and heartbroken sorrow. The manga also highlighted his presence in panels, making this particular scene one of the more emotional scenes of the series. After Allen returns with the Ark, Johnny defends him against the accusations that he is a traitor working for the Noah. A short time later, Johnny is impaled through the chest by the Noah Lulubell, disguised as Andrew Nansen, as her Akuma forces invade the Black Order HQ. He is later thrown by the Skull Tapp Dopp and is finally attacked by an Akuma. However, Johnny is saved before the Akuma could eat him, and he begs Allen to save everyone. Johnny disappears, along with Bak, Reever, the Generals, the scientists, Miranda, and Marie, when the level 4 Akuma destroys the fifth laboratory. He is later shown to be alive and in stable condition. He pleads and weeps over the Skull Tapp. When Tapp dies, Johnny is in tears.