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'Supergirl'
One of the most powerful female characters on TV right now, Supergirl's Kara Zor-El regularly was originally sent from Krypton to protect her younger cousin, Kal-El. That's right, she was sent to Earth to essentially babysit Superman. If you're like me and obsessed with all things superhero(ine), you'll certainly agree — Supergirl is kickass.