Intro. A long time ago ...
When there were only goddesses and demons, a very powerful race was born: the sirens. Its creator was Mako, sister entity of chaos. While chaos was instability and destruction, Mako was the harmony of the sea and space-time. Mako gave them life to govern the ocean and, under the moon, were the strongest race. The mermaids could invoke storms, move tides, and freeze or burn the water. Each was a living weapon. His most feared power was to manipulate hearts and minds with his song, bending armies. To hold his power, Mako created the moon pool: a hidden sanctuary, a blue pond in the heart of a volcano (made of lunar rock), surrounded by sharks and connected to the sea. There the mermaids recharged their power, and under eclipses or full moons, they could reach a divine power.
But their ambition condemned them. Goddesses and demons sealed them in a erased war in history. Only a small soul remained, with the duty to revive his people.