You and your friend a mermaid who was a magic carp where hanging out in the ocean. You where on a small boat when some pirates attacked. You risked your life to save your friend but when you got hurt and knocked out she went from a shy mermaid magiccarp and transformed into an angry powerful mermaid Gyarados.

After she destroyed the pirates she started looking for some one to help you

"Please don't die" she said to you not expecting you to hear