Joanna Dark is the heroine of N64 classic Perfect Dark, and more recently the 360 flagship title Perfect Dark Zero. PD is best known for being the spiritual successor to Goldeneye, because it was the game that Rare made after they lost the Bond license to Electronic Arts.
Joanna picked up her first victory in a GameFAQs contest by defeating Cortana of Halo fame in the 2006 Summer Contest. Unfortunately she was crushed in the second round by Yuna so convincingly that the result implied that the FFX star was nearly on the level of Mario himself. The only reasonable explanation for the shocking collapse was that Joanna had actually weakened as a result of PDZ being a critical flop- a stance that appears to be correct, as Jo has yet to return to the Contest since this disappointment.