Satan's character is not like a humans
We are capable of good and evil, Satan is not capable of real good, his fruit is like wax, inedible, it may look good, but it is twisted and rotten. Satan is still about making himself a reasonable facsimilie to keep people away from the truth. His goal is to take your soul to hell with him and to that end he will lie, cheat, promise you everything and give you only disappointments for all his promises.
Man's deception is that he thinks he can be in control of Satan or his angels the demons. The deception is that they will do anything for those who conjure them. This is not the case. Those who mess with things that they should better leave well enough alone are only living in the days before their death sentence.
We should have the attitude which was in Christ Jesus, Jesus did not feel sorry for Satan, towards Satan, Jesus showed disdain and He overcame him by quoting the scriptures, not by trying to coddle him.
Satan has no repentence, if he could he would still supplant God. And if you look around at what is going on in the world, he is still very much trying to do that. There is no Devil's Annonymous to reform him. No amount of worship ever appeases him. All the Muslims in the world who bow down and worship him, do not make him even one ounce kinder. He did not save the lives of those in the Indonesian tsunami, but the Mosques survived it. Of course of any building in the area, it was the only one well-built and so that really isn't a miracle. What is amazing, though he slays his people they still worship him.
God is GOOD, and there is NO DARKNESS IN HIM. Satan will change and put on many faces, but our Lord is the same yesterday, today and FOREVER. What is wrong yesterday, will be wrong tomorrow and in the future still wrong.
You cannot serve two masters, you will either love the one and hate the other, or serve the one and despise the other. You cannot love God and feel pity for Satan. Does Satan show pity for anyone???? NO.