Kage's information was the first in the list of ANBU members that was given to Orochimaru by Sai.
Kage is a reliable shinobi who always accomplishes his missions.
Kage has a crop of short, brown hair which hung over his forehead protector and dark eyes. He wears the standard attire of the ANBU inclusive of flak jacket and typical of most ANBU, he carries a sword strapped to his back.
Very little is known of his abilities but Kage is renown for his ability to swiftly approach targets under the cover of darkness, almost like a shadow — which may be where he got his codename from. He is also more than likely skilled in kenjutsu.