Arcane.

Arcane
adj. - known or understood by very few; mysterious; secret; obscure; esoteric.

Yes. That's what it means for all of you who were too lazy to type 6 letters into Google or Yahoo and see for yourself. I consider myself this obviously. Why? I consider myself this because I fit the definition. I'm shy, I keep to myself a lot. Only a few know about my real thoughts and real personality. Others just know me as another person who they may be acquainted with. I try not to share many things with people, because they could easily try to flip that on you if anything bad happens to the friendship/acquaintance. So I call myself Argyle the Arcane. And I will remain that way.