Kether was a multi-classed goblin whose main interests and talents revolved around archery, acquiring/using magical stuff, and general sneakery. His classes were Fighter, Rogue, and Disciple (the last of these being a prestige class thought up by the DM which revolved around the arcane and tricksey-thiefyness).
Kether's death is already spelled out elsewhere, so rather than repeat it in full here is an offsite link to it: [1]