Kobbeth, a Twi'lek male, held the rank of sergeant within the Galactic Republic's military. During the Galactic War, which pitted the Republic against the reconstituted Sith Empire, he was assigned to Belsavis. His wife, Trea, and their son, Viyo Kobbeth, resided on the planet Tython in Kalikori village as members of the Pilgrims. During a search of Rakata vaults, Kobbeth and Corporal Rand were rescued from an Esh-kha attack by a member of the Sith Empire. In an attempt to save himself and Kobbeth, Rand tried to tell the Imperial about a vault key.
Trea Kobbeth, a Twi'lek Pilgrim, was Kobbeth's wife, and Viyo Kobbeth was his son.