For basic Aigis info: Aigis is a robot, or anti-shadow weapon, built with a human psyche so she could call forth her own Persona and fight the shadows. In the original Persona 3, she was a supporting (though pretty important) character. FES, a release of the original with extra features, also included a bonus "sequel" of sorts called "The Answer" (Or "Episode Aegis") where Aigis takes over as the main character. Plus there is a cell phone game coming out called Aegis: The First Mission, which also features her as the main character, showing her missions 10 years before Persona 3. You can find more detailed info about the game and Aigis in the "about" section, but be forwarned that there are spoilers!
August 5th, 2008 Site Update: New layout! Finally! This was supposed to go up in like... June! And it's still not finished! Gah! xD I need new codes badly, and more in the about section. But this layout is still a vast improvement. If you saw the old one, you probably agree. xD