Aqua is a pretty girl wearing a sea-themed ball dress. Despite being a Chess Piece, the happy and rather unpredictable Aqua always keeps a smile on her face, much to the surprise of Team MÄR. Aqua refers to everyone with honorific suffixes in the Japanese version, while in the English dub puts either "Mr." or "Miss" in front of everyone's names, including herself.
Aqua appears in the 3rd round of the 4th Battle.
After witnessing several examples of how Rapunzel kills any losing Chess Pieces, Nanashi and Aqua fight each other, where Nanashi defeats Aqua with his Electric Eye. Nanashi, however, pretends that attack removed all of his energy in order to make the fight a draw and save Aqua. Although Rapunzel isn't happy about this, Aqua wins Rock-Paper-Scissors against her and Rapunzel doesn't kill her, but has her brother Girom do it in her stead. Her final words were an apology to Nanashi.
After Rapunzel was defeated by Dorothy, Nanashi floats her body into the water as a burial. Her character is based on The Little Mermaid. she uses sea-themed ÄRM.
