Ultimo and Vice are Karakuri Dôji, the mechanical embodiment of pure good and pure evil, devoid of human emotions that can cloud one's judgment. Their puprose: to battle to the death to prove once and for all wether good or evil is the most powerfull foce in the universe
Pure vice vs. Pure virtue. Can one win without corrupting the other?
i heartidly recomment reading this (recommending even more that you buy the manga)