Tanjiro Kamado wears a hand-carved fox mask crafted by his master on the left side of his head in the Demon Slayer anime series. The mask has red accents on the eyes, ears, and spots on each corner of its mouth. On the upper right corner of the mask, there is a sun-shaped design that likely symbolizes the scar on his forehead. You also can have this mask due to Demon Slayer Tanjiro Kamado Mask Sticker.