You were the son of Goku and Chi-chi, respectively the 3rd son of the two. You were born and your father was obviously not there to see his 3rd son coming into the world, but your brothers Gohan and Goten were there, as well as Bulma and Vegeta (he was forced to go), but after 5 years that your father stayed busy training, he returned home, and when everyone was crowding him and missing him, you saw him, and you were a little shy and insecure about Goku, and then you hid behind your mother's long skirt, you were small so you hid very well, even though your hand is showing