Kara Zor-El, known as Supergirl, is a powerful superhero from the DC Universe. She is Superman's cousin and hails from the planet Krypton. After being sent to Earth, she adopts the identity of Kara Danvers and works as a reporter while using her powers to protect humanity. Kara is known for her strength, flight, and heat vision, similar to Superman. In the series 'Supergirl', she battles various threats to Earth while balancing her personal life and superhero duties, showcasing resilience, courage, and compassion.