Originally posted by Regret
I'll explain the LDS (Mormon) perspective on the question. I will explain it more broadly than the initiating post to address some of the other comments in this thread.

The LDS, in keeping with early Christian beliefs, believe in preexistence. This means that everything existed prior to the physical creation, and that the spirits of men existed prior to the creation.

The LDS believe that the "Angels" are merely men, in spirit or physical form, that serve God, and act with the power of God through authority given them by God.

Satan, was a spirit child of God, just as all men are. Christ was also a spirit child of God. Christ being the greatest of all God's offspring, Satan second to Christ.

In the preexistence, God presented the method of creation and existence as we know it. Satan presented another plan where the agency of man would be removed so that "sin" would not be present. This conflicted with God's plan and thus was rejected. Satan, upset, rebelled against God, and one-third the hosts of heaven followed him, these were cast out.

Now, the LDS also believe in "opposition in all things". This implies that there is an opposite to Satan, which is Christ. It may also imply that there is an opposite to God the Father. It could be possible that there is another above Satan, according to Lds perspective, but it would only be speculation.

It is also probable, and more likely from LDS perspective, that the title is a hold over from Satan's position prior to his rebellion, and not indicative of anything else.

Interesting. The idea of an entity that mirrors God in the same way that Satan mirros Christ isn't something I'd considered. So it's possible that Satan was actually tempted away from God by some other being?