Son Goku is the main protagonist in the Dragon Ball franchise. He is one of the surviving members of the Saiyan race, whose planet was destroyed by Frieza.
Son Goku is a very skilled fighter and shows extreme determination to push himself to greater limits which helps him to fight against great evil that threatens to destroy the Earth or even the universe.
He is also pure of heart and resists trying to kill his enemies (he even showed compassion to Frieza) unless the enemy is too dangerous to be kept alive such as Kid Buu or his evil older brother, Raditz, and is even capable of befriending them such as Yamcha, Tien Shinhan, and even Vegeta.
When it comes to intelligence, he is a bit ditzy but is very knowledgeable about combat, capable of learning ki abilities at a very fast rate and mastered Kamehameha, Kaio-ken, the Spirit Bomb, and Instant Transmission.
Despite being happily married to Chi-Chi, she is also the only being in the entire universe that he is genuinely afraid of. He is the father of Son Gohan and Son Goten and the grandfather of Pan and the great-great grandfather of Goku Jr.
Despite being married he can still attract some women. On his journey on Snake Way, Princess Snake became enamored with him but tried to kill him when she learned he was married. During her stay on Planet Namek, Bulma realizes how handsome Goku had become and realizes she missed out.