Supergirl

Kara Zor-El is the daughter of Zor-El and his wife Alura In-Ze. Kara is actually older than Kal-El (Superman); she was a teenager when he was a baby. When Brainiac attacked Krypton, he took Kandor with him, while Kara and her parents remained in Argo. After Brainiac's attack, Kara's father created a force-field around Argo using a Brainiac Probe. When Brainiac returned to consume Argo City, Kara's parents had no choice but to send her in a rocket headed for Earth. During the journey her rocket was caught in a large kryptonite-encrusted meteor and she arrived on Earth years after her cousin did.

Kara was an insecure, fierce, impulsive, compassionate and sometimes immature teenager. At the beginning she came across as an angry, bratty girl due to suffering from undiagnosed Kryptonite poisoning when she landed on Earth. As an effect of spending thirty years trapped in a chunk of Kryptonite, her illness damaged her brain, making her prone to wild mood swings and odd behavior until it was correctly diagnosed and the poison purged from her body. Once free from false memories and mood swings plaguing her, Kara showed she was a troubled girl and lacked confidence, but was nice and well-meaning.

Having survived both the destruction of Krypton and Argo City, Kara had a huge case of "Survivor Guilt" and suffered from PTSD. Sometimes her considerable self-loathing and guilt manifested as a split personality called "Dark Supergirl" until she managed to forgive herself.