Unda Bleu (ウェーブブルー Unda burū?) is the daughter of a Sailor and a Mermaid, trained in the arts of sailing and swimming, she draws inspiration from the sea and all water bodies. Using the blade expertise of her dad and the water control her mother offered she developed her own deadly style, both offensive, defensive and even support, this style earned her the epithet of Tethys, the Sea Goddess daughter of Gaia and Uranus.