Aqua Deus/The Diplomacy & Declaration

Aqua Deus (水神) is the name attributed to an hostile entity first appearing in The Declaration. He's shown to been an Water Mage and considered as one of the four Cardinal Gods of Caliban. Wielding his trident, he's first shown deflecting Colette Craw's Light Magic spell the Storm of Light Needles with his own Water Magic of an unnamed spell.

Biography
Much like Auster Deus, his past and background has not bee revealed and such his an figure of unknown origins, but due to his element, suggested he's an Northerner.