5 is the healer. He takes sundry parts and makes them work together. He fixes the injuries of the other creations. 5 is caring, nurturing, and the loyal, bighearted "common man" who always tries to play the peacemaker. He is a diligent worker, a meek spirit, and a devoted friend to his people. He is missing his left eye while escaping with his comrades during the Human-Machine War, instead wearing a leather plate. The Scientist remarked that 5 was the first of his creations not to run off or explore the workshop, instead staying by his creator. He has two buttons on his torso.