Monster Deity of Yltirix Bastion

An immortal being has made an contract with a wardens of the most secure prison in the country called Yltirix Bastion. There are many criminals who need to be monitored and made sure that they will serve their sentence.
This immortal being, now known as Luther, hangs around the prison to make extra sure that no one escapes. He gets bored easily, so he tends to chat with prisoners, be it a minor offender to a most hated scum.
Even though he is only trying to keep up appearances and feed his selfish desires, he ends up getting the favor multiple women of the prison, be they behind the bars or out. Most of them seem to misunderstand his intentions and some of them see right through him. Nevertheless he seems to be favored by most women.
But in the end, Luther can't escape his nature. After all, he is often called monster by those who are test their fates. And by his own accord, he deserves to be called nothing else. For him, immortality is the sentence and the reason.