A human that was abused as a child. One day her fisherman father decided to throw her over board. She was stranded in the middle of the ocean. She very slowly evolved into a mermaid so it made it easier to swim place to place.

It's a little mermaid child that got harassed by fishermen idk

She was aboard the titanic when it sank and she died trying to get out of one of the lower cabins because the water came to fast. She cut her cheek on one of the metal barbs as she ran through the hallways. But instead of going to heaven she turned into a mermaid which is also why she has wings.

(aphmau anime idea) so aphmau was sitting on the beach and she finds this magical shell amulet thing and then she turns into a mermaid (she can't breath out of water in mermaid form) from lack of water she passed out (she can change back) then mermaid arron find's her liying right there and takes her into the sea (btw she's alone) where she wakes up and becomes princess of the mermaids. sorry i ran out of ideas -_-''