Komui Lee is the older brother of Lenalee Lee, and the head of the scientists in the Black Order. He is the creator of Sir Comalin the 1st, 2nd, 3rd, and 4th
When Komui Lee's parents died, he committed himself to raising his younger sister Lenalee Lee as best as he could. However when the Black Order discovered that Lenalee was an accommodater, they took her away from him. Not content with this, Komui himself joined the Black Order Organization. He was committed to getting Lenalee back and he rose rapidly through the ranks of the Black Order, becoming a branch Chief in just a few years. At this point he was given the authority to finally see Lenalee again. Upon seeing her for the first time in years, he found her confined and chained to a bed and severely depressed. She had gone through untold abuse and experimentation to synchronize her with Innocence so that she could become an Exorcist. Komui pulled some strings and was able to remove her from her confinement into his European Branch. Under his supervision, she was no longer confined but still bound to the Black Order Organization. She did indeed become an exorcist under Komui's direct leadership. He tried to re-connect with Lenalee and help her lead as good of a life as possible. It seems to have succeeded in part, as although Lenalee still has haunting memories of the past, her current self is a cheerful and caring young lady even in spite of her Exorcist duties.
Komui Lee is a supportive protagonist created by Hoshino Katsura for the series D. Gray Man.
Not much has changed with Komui Lee's character.
Komui Lee is a young man of lean build. He has light skin and shoulder length dark hair, with blue tints like his sister Lenalee. He usually wears his Branch Chief uniform which consists of a long white Jacket and matching cap. He is always seen wearing a pair of glasses.
Komui Lee can be a serious man when the situation is dire, but when things are going well he is a competent yet easy-going leader. He takes great pride in his inventions but is embarrassed when they have flaws. He also has a special soft spot for Lenalee and is always extremely concerned for her well being, even though she finds it overbearing.
Lenalee Lee - Komui Lee's beloved sister. He behaves more like an overly concerned and attentive father towards her. This is likely due to their forced separation and the fairly large age difference.
Allen Walker - Despite being in a difficult position where Allen is concerned due to his equals and superiors not trusting Allen, Komui himself believes in Allen and considers him a friend.
When Allen Walker arrived at the European Branch to officially join them as an Exorcist, he was mistaken for an Akuma due to his eye and facial markings by the guard. Exorcist Yu Kanda was immediately dispatched to deal with the "Akuma". Allen defended but didn't attack, claiming he was there at the recommendation of General Cross Marian. He was not believed but Komui's sister Lenalee interrupted the scuffle. She told Kanda that he was indeed telling the truth and that this whole issue had transpired because Komui had lost a letter of introduction for Allen that General Cross had sent ahead so that this situation would be avoided. Once the battle was defused, Lenalee invited Allen in, where he met a sightly guilty Komui Lee for the first time.
A short time after Allen settled in, Komui assigned Allen and Kanda a mission, their first mission together. He gave Allen his Exorcist uniform before leaving since he didn't yet receive his own and wished him luck. Allen and Kanda troublesomely succeeded in the mission to gather the Innocence of the Ghost of Mather. After a few days of recovery, Kanda called Komui and reported their success. Komui gave him a warning regarding his health which was not understood at this point in the story.
Komui Lee is not an Exorcist as hence has no supernatural powers. However he is a highly accomplished leader and inventor. In a mere 4 years he rose to the Rank of Branch Chief, a position of authority that grants him command over a squad of Exorcists, Finders, Finders and numerous staff as well as access to the most classified of information.
He is not only talented as a leader but has extensive knowledge of robotics and chemistry. He has created several Robots he named the Komlin with free will as well as vaccines and serums, some of which were however deemed too dangerous for use.