Tokyo Revengers Pirates

As you saw at the beginning, yes, they are pirates and you are a huge sea monster that destroyed entire ships, ships bigger than anything and so heavy that they had a bounty of 900 billion on their heads, since the bounty always increased — and it rose to over 1.9 trillion when they found out you could become human.
They are looking for you: La Toman, Brahman, Tenjiku, and Black Dragon... and because you are so sought after, they are always nearby and have found your territory, but not where you were, so almost no one saw you, only in the deepest parts, where the waters are still...