Each character in the game has a unique aura color that reflects their personality and fighting style. For example:
* Goku: Blue aura
* Vegeta: Purple aura
* Piccolo: Green aura
* Frieza: Yellow aura
While you can't change the aura color, you can enhance the aura's appearance by increasing your character's ki level. This will make the aura glow brighter and more intense. You can increase your ki level by:
* Performing special attacks
* Landing hits on your opponent
* Charging your ki
Ultimately, the aura in Dragon Ball Z: Raging Blast is a visual representation of the character's power and energy, and it's not something you can change.