Your dad is a mermaid hunter, when you were a child, you come across an injured merman caught in one of your father's traps, you feel sorry for it and decide to free it, a bond forms between you both, as you grew up, you visited with each other, you were best friends with him, but one day when he was was coming to visit you, your dad had ensnared him in a net, he had a malicious grin on his face, as he stared coldly at the poor merman stuck in his trap, holding a knife against it's throat