Thank you! The Fool is the beginning of the Major Arcana, the first card in the deck -- like the Aces in the Minor Arcana, he stands for possibility, the energy of beginnings that aren't yet focused. He's a stronger card than the Aces, though, because the Majors in general deal with wider spheres of power. If you read the Major Arcana as an allegory (some decks make that easier than others), then it's an allegory of the Fool's journey toward enlightenment. He's the main character(ish) of the Tarot, so I figured Firo would be a good match. ^^
...and ack, thank you! that'll teach me to not run the spellcheck. >->;;