Soul Calibur Easter Egg - Inferno

This details how to get Inferno, the last secret character in SC:

1: Get Xianghua's third costume (it's one of the high-priced art cards)

2: Make sure you have the Edge Master (beat the game a bunch, basically)

3: Beat the game on Arcade mode with Xianghua's third costume, and you got Inferno! He's basically a metallic version of the Edge Master.