ok i can explain who he is he's a powerful fighter from the anime called Dragon ball z and he is half saiyan and half human (saiyans are just like normal people but they are born with tails and turn into giant Ape monsters when they look at the full moon) and Gotanks is the fusion wariror of Goten and Trunks who are the main protagonists goku and vegeta's sons who use the power of the fusion to