Ewai was a male Cardassian who lived in the 24th century. In the 2370s, Ewai was the Chief Councilman of the Detapa Council.

In 2372, after being told of the Klingon invasion by Dukat, Ewai questioned the validity of Dukat's claim, commenting that Dukat could be fabricating the invasion to kill the Detapa Council members. Dukat was forced to take Ewai and the others away by pointing his phaser at them. Ewai was later evacuated to Deep Space 9. (DS9 novelization: The Way of the Warrior)

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