She was from the old Republic era and somehow traveled forward in time to the clone wars.

It is the height of the old Republic. Sith armies fight the Republic armies regularly. Sith Lords battle with Jedi.

Darth Medulla isn't a hardcore sith lord addicted to power and dominance, but she's definitely not anything close to a Jedi.

Today she is in battle with her Sith brothers and Sisters against a group of Jedi. She drives her saber through a younger knight, then the Knight's master counters her with a powerful force repulse. Instead of being thrown back and hitting some wall, she doesn't hit anything. Light streaks past her vision before it stops just as soon as it started. She stands up in a completely different time.