Tiamata is the first daughter of , who created her when taking part in the creation of the planet Gaiga. She is the earthborn spirit of the deep sea and governs the saltwater areas of Gaiga. Her sister is Apza, the earthborn spirit of the sweet-water bodies.


Tiamata is capable of shapeshifting, but her preferred form is that of an old lady clothed in blue and violet. Tiamatas eyes are as blue as the darker zones of the deep sea and her hair is dark green like seaweed and her body is colored like the nacre of a shell. She usually appears oversized, approximately twice a human size. While her arms tend to be human in looks, there were also instances where she had tentacles as arms.