Shuichiro Keido is a major character, who is head of the Antibodies in GHQ. He at first seems minor to the plot, but is revealed to be a major antagonist.
Appearance
He is a middle aged man, with greying hair, and a medium sized mustache. He usually wored a lab coat, when in GHQ.
Background
As a graduate student, Shichiro's brilliance isolated him from the rest of his peers whom he ultimately came to see as mere annoyances that obstructed his intellectual growth. Upon meeting Kurosu Ouma, he finally met a person, whom he could call his intellectual equal and two quickly became friends. However, Over the years, Keido's became increasingly embittered towards Kurosu as he witnessed his colleague's success and intellect steadily eclipse his own. Upon learned that Kurosu's offspring would become the progenitors of a new race in the aftermath of the Fourth Apocalpse, he experimented on countless orphan boys (including Gai) to create an "Adam" that would deny Kurosu the privelege of shaping the next generation of humanity in his own image. After learning that Kurosu's research on the Apocalypse virus surpasses his own, he murders his friend in a jealous rage. From that moment forward, Keido dedicates his entire being to ending the world that Kurosu worked so desperately to save prior to his death.
Personality
He is very stoic, and usually keeping a calm and collected face. The first thing that stands out about him, is his friendship to Kuruso. At first he was very happy, to have made friends with Kuruso. But his feelings eventually turned to jealousy when Yu revealed that his friend's DNA would be the basis of the next generation of humans. This was multipled when Kuruso was revealed to be ahead of him in their research of the Apocalypse virus. As a result he gains a desire to for the Fourth Apocalypse to occur, with him as Adam.