Daughter of Water

My parents have told me that I was born by the sea, for that was where they found me. They say I had been sleeping soundly until they pulled my small body from the water. A storm had appeared at that moment as I began to cry. Who am I and why was I found by water? And it was from a small necklace with a single word found on it that I was named Arina. It is the only key to finding out who I really am and my real family.