Most of the time, Hanzo dresses in black while in the dark as well as covers his face to avoid getting caught. The only black he does not wear is a silver metal headband, so his cranium does not receive damage. Also, he is calm, stoic & serious while carrying out his mission until the end. This has earned him many honors, including earning the title of ninjutsu grandmaster, as well as professional ninja.
Ninjutsu (忍術) is a form of martial arts centered around unconventional warfare, espionage and assassination that is purportedly practiced by the shinobi (commonly known outside of Japan as ninja).
More an art of tricks than an actual martial art, Ninjutsu included methods of unarmed combat (体術 Taijutsu; literally meaning "body skill" or "body art"), methods of combat with weapons (Katana, Wakizashi, Bō, Naginata, Kusarigama, Kunai, Shuriken etc.), methods of gathering information, and techniques of non-detection, avoidance, and misdirection. Ninjutsu can also involve training in free running, swimming, climbing, disguise, escape, concealment, and medicine.
Superhuman or supernatural powers were often associated with the ninja. Some legends include flight, invisibility, shapeshifting, the ability to "split" into multiple bodies, the summoning of animals, and control over the five classical elements. These fabulous notions have stemmed from popular imagination regarding the ninja's mysterious status.