Voice: Kim Mai Guest
First Appearance: Chaos at Earth's Core
Status: Legion Member

When her father, the patriarch of her family, died, Siobhan McDougal, the first-born child, should have been chosen to lead her family. However, she was denied the right to become leader by her Uncle Seamus because she was a woman. Siobhan's uncle wanted her brother Bevan to lead the family instead. Regardless, she went on with the process anyway but was interrupted by her brother and was dragged away to the netherworld. There, Siobhan was granted supernatural powers by the Crone to become the Silver Banshee.

The Silver Banshee possesses a sonic scream that can kill a person in focus as well as enhanced strength. She later became a member of Grodd's Legion of Doom. Silver Banshee's first mission was to travel to Skartaris with Metallo to aid the tyrant Demos and return with the giant kryptonite stone. However, Supergirl, Green Lantern, Stargirl, and STRIPE, members of the Justice League, showed up and stopped them. Silver Banshee was caught by Green Lantern but escaped back to the Hall of Doom.

During the mutiny onboard the Hall of Doom, Silver Banshee sided with Grodd against Luthor. Her current status is unknown but it is most likely she died in the explosion of their headquarters caused by Darkseid.