Green Lantern: The Animated Series (2011)

S1E9 ...In Love and War

Carol Ferris stumbles upon an extraterrestrial gem that transforms her into the formidable yet unpredictable Star Sapphire, a Violet Lantern. As she grapples with her new powers, she uncovers Hal Jordan's secret identity and confronts him, feeling betrayed by his dishonesty. Their clash not only tests their abilities but also their complex feelings for one another.