Chara’s personality in Undertale is ambiguous, complex, and heavily interpreted by players, shifting from a calculated, manipulative youth in backstories to a vengeful, cold entity in the Genocide route. Often viewed as clever, determined, and "not the greatest person," Chara displays a deep hatred of humanity and a cynical view. Ambiguous/Manipulative: Asriel reveals in the True Pacifist Route that Chara "wasn't really the greatest person" and was, at times, cruel. Deep-Seated Hatred of Humanity: Chara climbed Mt. Ebott for an unhappy reason and harbored a strong dislike for humans. Calculated & Intelligent: Chara is shown to be highly calculated, orchestrating a plan that required committing suicide to break the barrier. Genocide Route Behavior: In this route, Chara is interpreted as a callous and psychopathic force who acts independently of the player to cause destruction, often acting with impatience.