'Somersault Cloud'), which was another element adapted from Journey to the West. Also pure of heart, Goku has frequently granted mercy to his enemies, which has often earned him additional allies in the process (though has also resulted in others taking advantage of his kindness), and he is one of the few who can ride the magic cloud called Flying Nimbus ( 筋斗雲 Kintōun, lit. He is able to concentrate his Ki and use it for devastatingly powerful energy-based attacks the most prominent being his signature Kamehameha, in which Goku launches a blue energy blast from his palms. Goku is depicted as carefree and cheerful when at ease, but quickly serious and strategic-minded when in battle and also enthusiastic to fight. As Goku grows up, he becomes the Earth's mightiest warrior and protects his adopted home planet from those who seek to destroy it. Initially believed to have been born on Earth, Goku later learns that he is a member of an extraterrestrial warrior race called the Saiyans, which is also the reason for his superhuman strength, and his birth name is Kakarot. His origin story also shares some similarities with that of Superman. He is based on Sun Wukong (Monkey King), a main character in the classic Chinese novel Journey to the West. Son Goku is the main protagonist of the Dragon Ball manga series created by Akira Toriyama.