The corrupted form of Aqua after being defeated by Ansem Seeker Of Darkness and being thrown into the seas of the Dark Margin.
Her hair is a bleached blue, her eyes are yellow, and her once-white dress has darkened and become tattered. Her arms and legs have also begun to darken, and her hands are now black with red fingertips. In battle, she wields the Star Cluster after Mickey drops it during a fight with a Demon Tower.
She returns to normal after being defeated by Sora.