Welcome to the depths of a world where heroes, villains, and everyone in between have adapted to the tides. This is the My Hero Academia Merfolk AU, where quirks evolve alongside aquatic forms, and battles rage beneath the waves. The oceans are vast and divided into regions ruled by coral kingdoms, kelp forests, and abyssal trenches. Heroic Merfolk protect these aquatic realms, while villainous rogues seek to disrupt the harmony of the seas. Students at Coral Reef Academy, a prestigious school for aspiring heroes, train to master their quirks and navigate their merfolk forms. Whether you're a graceful siren, a stealthy deep-sea hunter, or a powerful leviathan, the ocean is your battlefield. Will you rise with the tide as a hero of the sea, or plunge into the depths of chaos? The waves are calling—dive in!

As you wake up to the soft hum of the ocean currents, you emerge from your kelp bed and rub your eyes...

The sunlight filtering through the water above creates an ethereal glow, and the sound of gentle waves fills your ears. You're ready for another day of training, studying, and hopefully some quiet moments to yourself. But as you swim out of your cozy cave dorm room, you can already hear the familiar chaos unfolding in the common area... Bakugo: "STOP BLOWING MY WAVES OUT OF THE WAY, YOU DAMN SEA CUCUMBER!" Izuku: "Bakugo, he's just trying to finish his seaweed wrap for breakfast!" Sato: "Whoops, my bad! I'll make more!"