Gohan is the son of Goku and Chi-Chi. Having Saiyan blood running through his veins Gohan possesses an extreme amount of power. His power is fueled by his anger just like most Saiyans. A time that Gohan first unlocks his hidden power is when a Saiyan named Raditz was hurting his father and Gohan's power level sky rockets. A Namek named Piccolo saw Gohan's potential power and took him away to become a strong warrior that he should be. Gohan was left to fend for himself out in the wilderness and soon became stronger than he previously was.