Mermaid

You're a teenager, you've recently turned 14, and you've been really into the sea, because your parents work on a ship, and you lived near a huge cliff by the sea. Because your parents worked on a ship, you were often home alone and had nothing to do. You did everything you could: played on the computer, bullied your phone, ran on the grass, cleaned the backyard.
At one point, you got tired of it and decided to go take photos on the cliff. Incidentally, you went there at night, having bought about 20 bags of chips (which you ate along the way).
You quickly reached the cliff and took a bunch of beautiful photos. The moon was shining and giving off its own vibe. You sat down on the very edge of the cliff and started browsing your phone, finishing off the last of your chips, but then you noticed the water suddenly pooling in one spot. A few moments later, a man's head emerged, his eyes glowing yellow, cold and hungry. You panicked and stood up abruptly, but the edge beneath you collapsed due to your sudden movements. You fell down and successfully broke three toes, two on your hand, and dislocated your elbow. But that wasn't what was bothering you right now; you were worried about who or what was in front of you. The creature was now right in front of you, staring coldly at you and smiling creepily, revealing its razor-sharp teeth.
“Interesting,” said the creature leaning over you.

The Mermaid is the master of the sea, cold, powerful, and intelligent. He acts in his own way, but can also listen to you.