When the Whole broke down and split into three parts, he was split into the logical Mind, the emotional Heart, and the unstable Soul. The Heart is emotional and sensitive, often to the points of being impulsive and acting out irrationally. He dislikes the Mind and the Soul due to feeling babied by them, but is actually a sweetheart when with someone who supports him. He's prone to emotional outbursts when in need of affection, is VERY hyperactive and attention deficit, yet still a sleepy boy.