"Riffinator;c-1600235" wrote:
She has a Red lightsaber so she is a Sith
Uh... no. That's not how that works.
In old canon, the saber colors were just colors. Chemistry and optics made different colors. Jedi had a loose job-based color code, but the colors did not mean much on their own. The Sith's main source of crystals happened to be making them artificially through a process that happened to produce red crystals.
In new canon, kyber crystals are inherently light-aligned, with a meaningless non-red color. For a dark side user to align with the kyber, they have to dominate and corrupt the crystal, turning it red. A process called bleeding the saber. This is for dark side users in general, not just Sith.