the character represents the quote that Bruce Lee used to say : "I fear not the man who has practiced 10,000 kicks once, but I fear the man who has practiced one kick 10,000 times."
the author said thise thunder/water/fire etc doesnt exist, its only their imagination but i disagree. how come he is fast + can fly above the sky if not bc of he produce thunder? i love all abt this manga, except the "actually those power doesnt exist" rule