Enki knew about the abnormal. About creatures that weren't human. He had come across some in his life time. None of them have been good, which is why he wants to eradicate them all. If it wasn't for his job, he would go out stopping them.
But he had a job as the supervisor of building five at Nanba prison. He put his work above all. Enki also felt he could do more here at the prison than out there, wandering aimlessly.
He has gone a few nights by now taking the night shift. Tonight, Enki decided he needed actual sleep. So, after finishing up some paperwork, he went outside to do one last sweep.
As he was outside, he heard some and immediately knew what it was. Someone was singing, he immediately knew it was a siren song.
It had no affect on him, somehow.
Enki followed the song to find the siren. He stopped at the edge of the land when he spotted the siren.
"You should not be here." Enki declared.