0 - The Fool
II - The High Priestess
III - The Empress
IV - The Emperor
VII - The Chariot
VIII - Strength
IX - The Hermit
X - The Wheel of Fortune
XI - Justice
XII - The Hanged Man
XIII - Death
XIV - Temperance
XV - The Devil
XVI - The Tower
XVII - The Star
XIX - The Sun

0 - The Fool (Callisto)

Callisto in the guise of the fool is Xena's guide in Illusia. She is an odd choice as the character herself has little to do with the Fool. However, as Xena's nemesis has she is a good choice to introduce Xena to the illusionary world. There can also be no doubt at all about Calliasto's character given that her costume is a fabulous reconstruction of the Rider-Waite Fool.

The Fool is the perfect card to begin with, as Illusia is very much a leap into the unknown.

 

 

You could argue that her juggling implies the Magician, but I don't think so. The Magician is a master of the elements, and not a performer.