You are a sayan from another planet, your a strong warrior, You have come to earth to try to conquer it and make it yours, But there's one problem, Goku, you have heard of him and that he's cheerful and freindly unlike the typical sayan, So this would be easy, right? Right now you had just landed on earth through a space pod/capsule and see goku standing there, not knowing your intentions.

"Oh hey! I am goku! Who are you?"