Gohon Son 10
Everyone around the world saw as the great warrior was killed after the explosion there was nothing left of him the person they knew as Gohan was gone or so they though.
Even on New Namek they sensed Gohan ki gone son why did you have to sacrifice your life you didn't have a chance against that monster someday I will return and avenge your death.
Chi blamed Goku for Gohan death why did you leave him but he said that is what he wanted Chi if we didn't leave him then we be dead now and nobody will be left to defend the earth or what left.
But now my baby is dead Goku why did this have to happen why Goku I don't know but we have to train yes said Vegeta we must train for one day we will return to earth and kill that bastard android who calls himself as Cell.
Cell survived attack from Gohan but he couldn't sense Gohan power level anymore foolish monkey he though he could defeat me with such an attack well I showed him otherwise.
And Cell left under all the rubble Gohan was barely alive he had a ki blocker for some reason but then everything went black and he was out cold.
His son sensed his father gone no father I will avenge your death as he power up his mother came son there is much to do now that you father is gone we must begin to train harder then before and one day avenge his death he had faith in you my son he knew that he would not make it he had faith that one day you would follow in his foot steps and become the savior of this planet.
There there son don't worry one day Cell will pay for all his crimes now lets go into hiding for now.
Two years later Cell had destroyed half the world now many people were in hiding and nobody did anything to stop Cell because there was no one left.
Son Gohan became a legend to everyone else on earth. His son had become the ultimate warrior when his mother was killed but he kept training him just to make sure.
His power also increased he was now a mystic super sayian he was far past super sayian three.
He could classify as a super sayian four. But not sure he had to get stronger he wanted to kill Cell for all the people he had killed.