Here's the rough design, probably will change a lot while sculpting this character.
Backstory:
"There was a little prince, a prince that lived under the sea. Little prince had a little friend, a friend that could tear everything apart, everything but the little prince. Everyone was afraid of his little friend, everyone but the little prince."
Time flew, they grow up. Little prince became a man, and a man must be sent to the war, fighting for his people. The day had come, prince must say goodbye to his little friend, little friend went crazy, destroying everything around him, little friend then dragged the prince running away from the castle, the prince was afraid, he drew his weapon and slashed to his friend, his friend lost an arm, the prince ran away, back to the castle.
"Sun's falling...", Prince stopped running and said.
It was actually a giant fireball cast by the fire legion.
The fireball went through the surface of the sea and hit the castle, it burned everything even with the water around. Everyone in the castle was burn to death, including the king. Those people around the castle were coralized due to the high temperature. The shock wave was spreading fast, the prince closed his eyes and accepted his fate, he started feeling his right arm burning, but then he felt himself covered by something cold, he opened his eyes, it was his friend protecting him with his body, the prince was saved. His friend was fine due to the hard shell on his back.
The prince then gathered those who survived the attack, hid in the deep sea.
One day they will be back to the dying sea and come after the living one.
*People who lives under the sea can't stand the high temperature, their body will start coralizing if the temperature get too high.
