Commission for Lemondrop

The backstory for this character is pretty interesting, it involves a woman who crashes her spaceship on a water planet. In order to sustain herself until help arrives, she eats the seaweed and whatever sealife she can find. But it seems that eating it raw has some secondary effects and as weeks pass by, her body slowly mutates into the one of a strange mercreature. While this allows her to survive in her new environment, she can no longer go back to her home planet..