"Gra'tua cuun hett su dralshy'a (Our vengeance burns brighter still)"
Kelborn Kassar was a human male Mandalorian, born on Endor. He had a twin sister, but they were apparently seperated for unknown reasons. He later found her on Tatooine. He served as Alor'ad (Captain) in Clan Skirata after he had founded his own Clan, Kassar.
At 27 years of age this Mandalorian didn't know his real planet of origin. A lot of years ago, when he was only 4 or 5 years old, the ship of his father, D'arin Kassar was attacked by pirates, or something else, and crashed on the Endor moon. D'arin and Mira, his mother, died in the crash. Kelborn was saved by Ewoks, and lived with them. One day, he found the crashed star courier of his father, the armor of his father, and holograms about his father's quest: finding someone named "Mand'alor". The holograms contained also some détailed files about his real culture: The Mando'ade. Alone, Kelborn learned, and when he was 13, he decided to undergo some tests, to become an adult. After repairing the ship of his father, he moved to Tatooine. Attacked by Tuskens, he thought suddenly it was the perfect test for him. he uses the claws of his father's armor only, and attacked them back. This night, he killed all male Tuskens, leaving only the women and children. After killing the Tuskens, the young Kelborn thought it was not enough for his tests. He stayed two complete years in the deep desert, surviving alone, while continuing to learn the Mando'ade Culture. Two years later, a Star courier named the D'arin Runi left Tatooine, with a Mando'ade on his board, helped by his little R2 droid.