Cell

Cell is a fictional graphic novel super villain who first appears in the Dragon Ball manga created by Akira Toriyama, followed by Dragon Ball Z and Dragon Ball GT. He is the ultimate creation of the scientist Dr. Gero, cloned from the cells of several characters from the series. As a result of the cloning, Cell is labeled the "perfect warrior," possessing genetic and even personality traits and abilities from almost all of the Dragon Ball characters. These include, but are not limited to, Piccolo, Freeza, Vegeta, and even Son Goku himself.

Cell has as an original personality with various other characters' personalities added in; the computer redesigned the weak parts of the original personality, adding in the personalities of various different characters to make him the perfect weapon. Throughout the Androids Arc, Cell's personality changes drastically with each transformation. At first, Cell's desire to complete his evolution by absorbing both Android 17 and Android 18 is what fuels him. Upon reaching his final form, his eagerness to test the limits of his newfound power is what defines his character.

Cell is unique among most villains of the series in that he is quite sophisticated. Because of his genetic composition from other warriors, he is able to psychologically manipulate those warriors and exploit their weaknesses to his advantage.

(Source: Wikipedia)