Since the question is not directly answerable by the Judeo/
Christian scriptures, we are simply left with speculation.
The Greek word for "anti" can mean "false" (as in pseudo) as well as "against". So, it can mean anyone who is a false messiah. History is full of such people. At the same time, the biblical references do indeed indicate one final individual who is spoken of as the "man of lawlessness" who will take advantage of that last generation which has fallen away from or abandoned the historic faith of the Church.
The scriptures declare that there are (and have always been) many antichrists. As a result, It would be fair to guess that many of them knew they were not the Christ (Messiah), and some that thought they might be a messiah of sorts. Those who know they are not are deceivers, and the rest are delusional (at best). The
Anti-christ (capital A) is represented as being very arrogant and boastful ... very full of himself.
My best guess is that the final
Antichrist has spent much time in the esoteric and arcane teachings of the Kabala, as well as the many masonic traditions espoused by Pike in Morals and Dogma. He knows the terminology of the Bible and
Christian doctrine, but his understanding is quite different from that of the Church's - something he is likely quite aware of as well. He will most likely privately believe that he is one of the wise and enlightened souls who knows the ancient "secrets". He is also likely a proponent of the idea that Lucifer is a good guy - the enlightener of mankind.
If he is a willing pawn of Lucifer (as I suspect he will be), then he is a deceived deceiver.
We will have to wait a bit longer to see which figure rises up with a "solution" to our economic problems and those of the Middle East. So far, none of the individuals on the world stage have names or titles that numerologically add up to 666 in Greek or Hebrew. But from all of the
New World Order efforts taking place, the forces of darkness are certainly jockeying for positions of prominence.