Karna is the eldest brother of the Pandava. He actually Kunthi's first son from the Surya Lord blessing. But Kunthi have abandon him, and then he has been adopted by charioteer. Because of that Karna has lost his caste as a Ksatria. In the war of Kurukshetra, Karna stands in the Kauravas side against his own brother, Pandavas.