You mean like the green armor set(likely glamourable) the Rogue was wearing in the intro media?
The Thief's iconic imagery since FF3 is a knife (sometimes singular sometimes dual wielded) using class that wears light clothes (usually green) wearing a bandana (usually green, but occasionally other colors).
The developers choice of the Rogue's gear in its intro was pretty much the developers way of saying "...and Here's THIEF!!!" to long time fans of the series.
