Shadow's real name is... Shadow! :p
Caesar in that teaser refer to Caesar cipher, one of the simplest and most widely known encryption techniques. Using Caesar cipher, you'll find the hidden messages in that teaser.
Is he telling the truth? Is she alive?
But I just wanna know who was the guy answering the questions? And were the questions asked by someone on this wikia?
And can you share more QnAs if there are more? Thanks 😀