Character: guard (squid game)
The Guards in the series Squid Game are characters seen with magenta jumpsuits with hoods, black boots, and porous black masks covering the entire face with either a white circle, triangle, or square painted on. They can also be seen with weapons on occasion, mostly firearms.
There is a ranking hierarchy between them, with circle guards being at the bottom, triangle guards being in the middle, and square guards being at the top.