Gohan is the son of Goku and Chi-Chi. He's named after his late grandfather Gohan. Gohan is like his father, he's a saiyan. And at the age of 5, Gohan saves the world. And after Goku's death, Piccolo takes Gohan and teaches him how to fight. While training with Piccolo, Gohan learns not to a little scary cat and fight. And Gohan learns to like Piccolo and gains his friendship.
In Gohan's first fight, Gohan learns that training was over and it's time to fight. Gohan chickens-out in the beginning, but Gohan later fights back after Piccolo sacrified his life to save Gohan. And near the end of the fight and Goku is down ( if didn't know you can use the Dragon Balls to bring people back to life.)