Character masks are special pieces of clothing that cover the face and help people look like different characters. People wear these masks when they want to pretend to be someone else, such as when they're doing something crazy and fun, like playing a game or dressing up for Halloween. The masks cover parts of the face, so it's harder to tell who's behind them. It's like when you play the game blind man's bluff, except you wear the mask all the time so people can't tell who you are!