My idea for The Fool came from concentrating on the trickster/madman aspect. I didn't want to have the typical jester kind of fool that you always see, though I did set out to reflect a part of that aspect (mainly in the clothing.) Also, because The Fool represents the protagonist of a story, I wanted the character to be neither male nor female. Or perhaps both. Or whatever the viewer wishes to see. So I cast him (I still say "him" though) as a sexless figure.
My current project is working on all of the Major Arcana. I hope you enjoy!