A promising student
Aqua is a character from the video game Kingdom Hearts appearing in the episode Birth By Sleep but being especially important in Kingdom hearth 3. With Ventus and Terra, she is one of the three students trained with the Keyblade by Master Eraqus and the only one to have reached the rank of master. She is very friendly with Ventus and Terra. In order to save Terra, she ventured into the darkness, but having lost her keyblade, she could no longer fight and she sank into the darkness and was never seen again.