Kamui Woods' face is unknown since he has only been shown while he is using his quirk. His Hero Costume includes a wooden belt, wooden knee pads, and wooden shoes. A small rose veil hangs from the left side of his belt.
No one knows what Kamui or Shinji Nishiya really looks like under his costume since the anime and manga have never shown what he really looks like before.
After he officially became the No. 7 Pro Hero, his costume was slightly modified, and he now has two wooden rings hanging on his shoulder, which have stumps and branches protruding from them.