Saiyan Prince Vegita
Yeah. Not really expecting to win, just wanted to be in the first week of the Cosplay Arena. That being said, unless you live in a cave, you know who Vegeta is.
If you DO live in a cave, Vegeta is the hero, anri-hero, or villain of Dragonball Z. Depending on what part of the series you're watching. He is the third to reach Super Saiyan, and best known for his extreme arrogance, his short stature, and his constant reminding of everyone that "I AM THE PRINMCE OF ALL SAIYANS!"