There are many ways to make an anime character memorable and iconic. The use of scars, specific outfits, hats, and even masks can help distinguish them from the others and make them more unique. Masks are particularly useful in hero and villain stories like in the animes: My Hero Academia or Demon Slayer. Masks are a great way to hide one's identity, no matter their motives (good or evil), and make the character even more intriguing and mysterious to the viewers.