Imra Ardeen is the superhero known as Saturn Girl. She is one of the three founding members of the Legion of Superheroes and the love-interest of Lightning Lad and Cosmic Boy.
Saturn Girl helped stop the Sun Eater by making it believe the sun went missing for a few minutes to give the Legion time to destroy it.
Saturn Girl was put into a healing coma during a battle with Esper.
When Superman is presumed dead, Kell has Saturn Girl check Superman's mind which results in him being saved from being consumed by the sun, and she also sends Superman and Kell into Brainy's mind to confront the original Brainiac and unites their spirits as well.
- Kal-El/Clark Kent/Superman - Leader and friend.
- Kell-El/Superman X - Teammate.
- Brainiac - Enemy.
- Cosmic Boy - Former leader and friend.
- Lightning Lad - Love interest and teammate.
- Brainiac 5 - Friend and teammate.
- Bouncing Boy - Friend and former leader.
- Phantom Girl - Friend and teammate.
- Timber Wolf - Friend and teammate.
- Shrinking Violet - Teammate.