According to the description in the riddle, the tears of this zodiac are not easy to move, and it seems that there is an innate tenacity and dignity, which is also the characteristics of the dragon as a god. At the same time, the riddle also mentions the "natural eight characters", which may mean that the fate of this zodiac has long been doomed and cannot be changed at will, which is also in line with the image of the dragon as the god of fate. So, I think the answer to this riddle is "dragon".