Koa is one of three pygmy assistants under Rimba, the other two being his twin brother Kuya and the woman Jelli. Like others of his race, he lives in Miba village, wears his black hair in a braid down the middle of his back, and is dressed in a traditional white cotton shift. Koa constantly dreams of succeeding Rimba as the village priest, an aspiration he must compete for against his identical brother.