Backseat Fighter

On his way to King Kai's Planet, Goku suddenly hears a voice in his head giving him advice. Introducing himself as Remiel, another soul that lives within him, he proceeds to warn him about the future and what to expect from the evil Saiyans planning to take the Dragonballs. With this new knowledge, Goku swears to grow stronger than ever before with the help of his new friend. SI/OC