"It is not. We have met very few Sith, but they have similar aura's. Your's is..." Vector searched for how to describe it. "Lighter. Not as harsh."

Of the few Sith he'd met, their auras had been dark, an almost angry shade of red, seeping with darkness. But Altair's aura, it was softer, with a hint of lightness to it. More of a purple color. It was difficult to describe to one who wasn't a Joiner.