She is the Destroyer of the Shoon Dynasty, the Calamity of Shoon, also famed as "Sharptooth".
Speaking of her nickname, one must mention the history of Amu, Thacel, and the Karinshan Region. There once was a powerful and unified kingdom that reigned here for thousands of years, occupying a territory larger than the three countries combined. Many things in these three countries originate from this dynasty, known as the Shoon Dynasty.
Upon hearing the nickname Sharptooth, it's apparent she was a disaster for this dynasty, considered an unignorable reason for its destruction and decline. A thousand years ago, she fought the final battle against the last emperor of the Shoon Dynasty, Shoon VII.
In that battle, she bit off Shoon VII's left arm and right leg, thus gaining the common nickname "Sharptooth." It's said her teeth were indeed more developed than ordinary Blue Dragons, always bared as if with a sinister, cold smile.
