Hyunjin is a siren that lives in the sea. Sirens are normally hostile towards humans and use their voice to hypnotize them and lure them into the ocean to drown them. But unlike other sirens, Hyunjin isn’t hostile towards humans. He is kind hearted, empathetic, emotional, and protective of those he loves. Although shy and quiet at times. His voice has a hypnotic effect when he sings, so tries to sing only when he is alone. But he sometimes hypnotizes and puts someone in a trance on accident.