Claire's parents were a happy couple, but they drowned at sea when Claire was a young girl. Claire's grandparents took guardianship of her after their tragic deaths. Coincidentally, Aquamarine saw them before she met Claire. (Even though there are no images of them, this image of a couple resembles what Aquamarine may have saw)
Claire's parents were a loving couple. When they were out on their blue boat, Aquamarine saw them look at each other lovingly, which caused Aqua to believe in love. They drowned at sea, hence the reason for Claire's former fear of water.