Art Director Yusuke Naora and Producer Yoshinori Kitase were present at the opening of THE ART OF FINAL FANTASY X/X-2 charity exhibition held at Gallery Nucleus in Alhambra, California on March 16, 2014.
Naora did a special live digital painting of Yuna and Tidus from the game which you can view below. The original file was deleted intentionally (what a shame!) after it was printed and signed and is currently available for auction at $3500 USD as of this article. Along with the painting, other items are also available including signed concept art pieces, signed giclee prints, and original sketches by some of the production team such as Character Designer Tetsuya Nomura.
Proceeds for the auctions will go towards the Typhoon Haiyan relief efforts. You have until March 26, 2014 at 11PM PDT to bid.
With a lot of Final Fantasy X fans out there, bidding are expected to be fierce.