Ari

From Memory Alpha, the free Star Trek reference.

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Ari was a Cardassian soldier serving on Cardassia in 2371. He was an aide or other form of associate to Legate Tekeny Ghemor, and a member of Cardassia's dissident movement opposing the seemingly limitless authority of the Central Command and the Obsidian Order. Fiercely loyal to Legate Ghemor, he was killed by Entek, an Obsidian Order operative attempting to expose Ghemor as a traitor. (DS9: "Second Skin")

Ari was played by Billy Burke.