This is my first time ever hearing of her, a quick Google search only managed to turn up a handful of FFXI spinoff mangas.
Tracking this down was not simple. I started by browsing Youtube until I found a video of the game's ending credits. As no English user had uploaded this, my lack of fluency in Japanese had me resort to a general query of the game's title in the language and a lot of trial and error. After I finally found the video I was looking for, I fired up a virtual katakana keyboard as well as Google Translate and starting parsing each major staff title I came across by hand. Once I found "Main Character Design", I plugged the staffer's name into a Hiragana to Romanji converter and came up with this. I've also updated the game's Wikipedia article accordingly.
Ugh, I should really try picking up Japanese one of these days.