By default, Joy's mask is basically constantly animating and being flashy. It never really stops to just exist. There's beauty in simplicity. Plus, it's usually showing masks of other heisters, which makes it feel like Joy has less of an identity of her own.
This makes it so the mask is always a two-tone red and blue, with an occasional red or blue horizontal scrolling stripes animation. It's much less flashy and constant, while keeping the unique gimmick, and is very distinctive to her.
