A very long time ago, a curse had been placed on the Matsuno family, causing each of the descendants to be monsters. The curse had not been broken, since there is no known way to break it. They are born human, but at a specific time of their life they start to show signs of showing their monster form. They each have two forms, humanoid and full monster. Designs will be released when ready. This fic will be a set of one-offs based on the actual show, and original stories as well. If you would like to submit an idea, send it to the tumblr Zimtard through the submit feature.
KARAMATSU- A siren. Karamatsu was the first of the brothers to find his form. He uses his hypnotizing singing voice to his advantage, mostly calming people down who get angry at him or his brothers. His teeth are sharp and jagged, and his pupils are pure black slits. Kara has decorative fins all down his back, and a eel-like tail. He has fish-like gills on parts of his body, and can breathe underwater. If he is fully submerged in water, he grows a mermaid tail in place of his normal one, along with his legs.
TODOMATSU-Goo monster. The second to become a monster. He tends to hide his monster form to try and not be seen as a freak. Totty has long rabbit-like ears that go down to his shoulders. He has one eye and two large fangs at the front of his mouth, along with a long tail. He covers his goopy parts with gauze in hopes that emnobody/em will notice. The only time he takes off the gauze is when he's home, or with someone he trusts. In stressful situations the goopy part of his limbs start to melt. Design will be based off of The Invader Zim comic issue 9 (Totty's design will be based on Dib's alien disguise)
CHOROMATSU- Plant beast. The third to become a monster. Almost always seen as some sort of nature spirit. Whenever he touches grass or nature of any sort, it will start to grow. If he stays in one place for too long or gets excited, a whole tiny garden will grow around him. He has pale green eyes with dark green pupils, he also has gazelle-like horns. His arms are replaced with large paws covered in thorns (See Omega Flowey from Undertale for ref).
ICHMATSU- ? The fourth to become a monster. He only is able to eat things raw, having anything cooked makes him terribly ill. He will normally eat any small animal he can, other than cats. He has a thick mane like a lion. His teeth are razor-sharp, and he has light purple cat ears, with a tail to match.
JYUSHIMATSU- Dragon. The fifth to become a monster. (actually happens in-show, episode 9, after Homura tells him she has to leave.) Jyushimatsu turns into a dragon when he feels a strong emotion.. His dragon form will normally attack it's surroundings/curl up and cry. Depending on the emotion. He has grey horns and large pastel yellow wings, and a matching tail. His wings are coated with feathers
OSOMATSU- Sphinx. The last one to become a monster. (Around episode 13) Other than being a huge prankster, Oso loves to tell riddles. He'll do about anything to confuse his brothers. He basically looks like a normal Osomatsu, but with a lion's tail, tan and red wings, and paws for hands.