Sub-commander Ustard was an officer in the Romulan military.

He was killed in a transporter "accident" the same year that Elim Garak worked as a gardener at the Cardassian embassy on Romulus. Circumstances suggested that Garak was responsible, though no proof ever emerged. (DS9: "Broken Link")

This character was only mentioned in dialogue.
According to the script, the pronunciation for this Romulan's name was " 00-stard". [1]
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