How do you unlock your Aura in Tekken 6?

Oh, dude, unlocking your Aura in Tekken 6 is like finding the secret sauce for your character. You gotta beat the game with each character to unlock their Aura, which basically means you gotta show off your skills with every fighter. So, like, get ready to throw down and level up your game if you wanna unleash that sweet, sweet Aura in Tekken 6.