Rowena Ravenclaw
Reasoning: Founder of the Hogwarts house of Ravenclaw, which welcomes students of exceptional intelligence. This card represents pragmatism and practicality, of directing energy towards tangible physical results and prosperity. This card calls for drawing upon all your resources (including mental) to achieve your desired result..
In a traditional tarot deck, this is the Ace of Pentacles.
Notes
This card was pretty unremarkable in its creation. The most major change that this Rowena took over all my other depictions of her is her clothing: I feel it is much more accurate to her time-period than the Renaissance clothes I used to draw the Founders in. I pictured her as somewhere between a wise Druidic priestess, scholar and a banker. ;)
The background is admittedly a bit uninspired... but it was good to try, as I was exercising the theories I learned in art classes about how things in the background get lighter the farther you go back. I think that worked well here, if nothing else.