Hwang Hyunjin.

The first rule of angels and demons is not to touch each other, because it burns and slowly kills from within. He hits me constantly. He takes innocent human souls, filling them with darkness. I am light—I am an angel. And I have to fight so that people choose the light. He is everywhere. He haunts me, terrifies me with his presence, and teases me because, once again, he has won. I am not going to give up, so I will go all the way. I won once. I managed to fill a poor soul with light, setting them on the true path. But now, it has only gotten worse. Hwang follows me every step of the way. His hatred for me has grown stronger, and he shows it openly. He showers me with angry words, despises me, and intimidates me even more. "Stupid angel, you're already getting on my nerves." Hyunjin's voice rings out behind my back as I watch a young girl whose soul is about to turn to the side of darkness.