My part for that couples OC exercise with Deru! The constellation Cetus is often represented by a sea monster that somewhat resembles a monstrous narwhal, with a horn sticking out of its snout. I was inspired to make a narwhal-sea-dragon-mythological-girl! She ended up being my FIRST EVER PRINCESS OC OMG?!
In short, the legend of Cetus goes something like this. The Ethiopian queen Cassiopeia boasts being more beautiful than any of Poseidon’s daughters (the Nereids). Poseidon floods some of their land and sends a sea monster (Cetus) to occupy it. The king and queen consult the oracle of Ammon (Ammon is a Libyan god. This is quite the multicultural myth) who tells them they must sacrifice their daughter, Andromeda, to appease Poseidon. Like all good parents they’re liek, “Okay!” and the king (Cepheus) chains her to a rock in the sea. Meanwhile, the hero Perseus who had just slain the Gorgon was flying past (winged sandals), holding Gorgon’s head (what a coincidence). He swoops down and saves the day, waggling Gorgon’s head at Cetus (turning it to stone). The blood dripping from Gorgon’s head then turns into a pegasus (shiny winged horses are of an unusual aesthetic for one of Gorgon’s byproducts) that chews off the chains from Andromeda (hella teeth?!) and then Perseus carries Andromeda away and they get married (that was fast.)
That was actually longer than intended, but what I wanted to say, was, well, the original myth doesn’t make much sense after a certain point, doesn’t it? xD So here’s my version, wherein Andromeda and Cetus are actually one and the same. (Hence this OC. 8’D)
It begins, once more, in Ethiopia- but without far-fetched coincidences. Perseus, who has just slain the Gorgon, is on his way back to Greece; the King and Queen welcome him to make a stop in their country and host a banquet for this great hero. At the banquet, Perseus is charmed by Andromeda’s beauty and gives her more attention than the queen can bear; thing is, she has quite the jealous and vain character, blaming the loss of attention from those at court on the fact that she is growing older while her own daughter grows more beautiful. In a fit of anger, she declares before all that she is still more beautiful than her daughter- in fact, she is even more beautiful than any of Poseidon’s daughters.
That evening, she commands servants to take Gorgon’s Head (which they had put into royal safekeeping for Perseus during his stay in the kingdom) and show it to Andromeda. Her daughter is petrified, turned to stone. It doesn’t take long for the winds to carry the news to Poseidon. He had the perfect retaliation in mind, and felt sorry for this girl, Andromeda. He came to her in the dream within her frozen state, telling her to come to the ocean, where she would be safe and live as one among his own daughters (+1 daughters prettier than you, Cassiopeia.) He could not undo petrification by force of will, but he could change her into something else- so she reanimated, still of stone skin, but with hair that turned dark and green like seaweed. A moving statue frightened the first to witness her attempting to sneak away, of course, and soon she was being chased out of the castle by military force. The arrows that came glanced off her stone skin, so she made it to shore unhurt. Perseus, of course, was quick to respond to claims of a stone monster on the grounds- but upon seeing her, he knew it was Andromeda, and could easily guess what had happened. Upset, he confronted the queen, who responded with threats- and so Perseus immediately left the country (so done.)
Once Andromeda hit the water, Poseidon’s spell could come into full effect and she took the form that he had granted her; a sea monster. (Stone would sink u gaize.) There was a kerfuffle with ships but she escaped.
Now Cassiopeia and Cepheus had to explain this big mess, and their daughter and Perseus’ absence, to their people- and made up the myth that we know, with the elopement and all. They called the sea monster Cetus, and that’s what she calls herself now, too.
Anyways now she takes one form on land and another in water and spends her days being a laissez-faire (y’know, thick skin, laid-back) ethiopian sea monster girl that enjoys thrilling encounters with humans (in either form) and exploring the ocean. She never thinks about the past, the past is for losers. As the only Nereid that cannot swim in a human shape, however, she may or may not be interested in a Zelgadis-like quest for a petrification cure. Yep. Meanwhile she gives her sisters awesome sea monster rides, eats fish, and pokes holes through ships that fish where she likes to eat.