Erko
Erko was a Kostolain native, who served as an escort for Campio, the third minister to the Conference of Judges.

In 2368, while Campio was engaged to Lwaxana Troi, Erko served as Protocol Master for the proceedings. A conservative, traditional soul, Erko was mortified by disrespect for Campio, and, apparently, by nude Betazoid women. Troi disliked Erko so much that she began to refer to him as "Jerko". ()

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Kostolain natives
Government officials