Son Gohan
is the son of Son Goku and was born about half way through the series. He is very strong just like is father but doesn't like fighting as much. However is forced to fight he is quite formiddable. After his father was killed by Raditz, Gohan was kidnapped by Piccolo who forced him to unleash his hidden powers by giving him harsh martial arts training.
For this cache Gohan is still a kid so he is hanging around in one of his favourite parks where three caches used to be. It's such a nice park Gohan decided to drop a cache here for all you Dragon Ball / cache hunters to find that contains a puzzle piece to find a Dragon Ball.