I stumbled across this perfect tarot deck today.
It's exactly the kind of thing that one of the characters in the novel (Mina) would drool over - 50% Sanrio goodness, 50% classic Rider-Waite imagery.
From the (review) site:
"Based on Hello Kitty cartoon characters and Rider-Waite imagery, this deck is as cute as the cover card claims! I am not that familiar with the cartoon, but the meanings are obvious enough to anyone. Cute or not, these would still be very easy to read with."