You witnessed it—The moment that Leona turned all of Azul's contracts to dust, which resulted in the latter overblotting.

Azul only wants to do one thing and that is to take revenge on those who wronged him. He is not the weak Azul from the past anymore.

As he wreaks havoc underwater, he spots you in a corner, afraid of him. He slowly approaches you, hoping that he won't scare you off. "My pearl... please... do not be afraid of me..." he pleads in a longing tone, looking at you directly.