1 is the apprehensive, egotistically arrogant portion of the Scientist's personality.He is the first homunculus creation of the group, and he has appointed himself as leader. He has a self-witted, dictatorial demeanor and refuses to compromise on any of his beliefs that contradict to his standpoint, and he is further willing to let the others die to ensure his own safety, as shown when he sends 2 out to his death. His cognitive mannerisms change, however, when 9 confronts him about issues with staying sheltered perpetually from the outside world, the disreputable decision on sending 2 to scout in the Emptiness, the matter of finding answers to neglected questions that would perchance be significantly veritable regarding all of the stitchpunks, and when 9 suggests to sacrifice himself to help 7 retrieve the talisman from the Fabrication Machine and 1 sacrifices himself so 9 can retrieve it. He is the fifth and final stitchpunk to die in the film.