Fed up with the Second Hokage's suspicions against the Uchiha clan, he plotted to take back the supremacy held by the Senju clan.
He had spiky, dark hair and dark eyes. He wore the typical Uchiha outfit consisting of a high collared shirt and a pair of pants. He also wore a face guard that only covered the right side of his face and a sash over his shoulder which held his rather large sword strapped to his back.
Setsuna can mean "moment" or "instant" (刹那), or "painful", "trying" or "oppressive" (as a shorter version of 切ない, setsunai).