Mermaids are women who had been drowned by sailors because of superstitious beliefs. They might have died, but that didn't mean they weren't angry. The sea is not merciful, and neither is Yaishara Lhal'Yakir, of the great Hisomi people. She burned to right the wrongs that had been done against her, and to taste the iron tang of their blood on her tongue: which wasn't that unexpected really, she got that trait from her father.
Born again into the sea, she's not going to let any man get away with anything. Her name is Yaishara Lhal'Yakir and she's going to turn the sea red.