Silver Banshee (Siobhan McDougal in original version, Siobhan Smyth in the new timeline) is a major antagonist in the Superman and Supergirl franchise. Siobhan Smyth was once the best friend of Kara Danvers in the comics, but became the supervillain Silver Banshee when her father attacked. However, she learned to control her powers when Kara helped her overcome the Banshee curse.
She was cursed with the ability to release supersonic shrieks and screams due to being wronged by Supergirl's alter-ego, Kara Danvers for getting her fired from the CatCo newspaper company, teaming up with Livewire to avenge herself. Additionally unlike the comics Siobhan and Kara remain enemies.
Kryptonite (Red • Silver • Blue • Black) • Toyman's inventions • Vigilante Suits • Oliver Queen's Bows • Phantom Zone Projector • Glasses • Legionnaire Rings • Yellow sun grenade • Myriad, Jarhanpurium, • Lexosuit • Book of Destiny • Book Of Ra • Staff of H'ronmeer • Sword of Juru • Antimatter • AllStone Totems
Species
Kryptonians • Metahumans • White Martians • Saturnians • Amazonians • Daxamite • Green Martians