Iarni Koban was a charismatic male Human born in the year 2347. He led the human slave labor force in revolt against the Tseetsk on Koorn.
Around 2362, Koban was gravely injured in a terraforming accident, and half his face was badly scarred.
In 2367, Koban took Captain Picard and Counselor Deanna Troi hostage to extort their starship into waging a genocidal war on the Tseetsk. (TNG novel: Chains of Command)