What does the circle mask mean in Squid Game?

Related posts:

1. What kind of mask is used in Squid Game? What kind of mask is used in Squid Game? Fuinloth Balaclava Face MaskSquid Game guards......
2. What card leads in spades? What card leads in spades? The player to the dealer's left plays first ("leads"). They may not lead with a spade unless their hand only includes spades. In fact, unless a player has no option, spades may never be led until the suit is "broken" (see “Breaking Spades” below)....
3. Why did they make video games? Why did they make video games? These early computer programmers weren’t just wasting time or......
4. Who killed the old man in Squid Game? Who killed the old man in Squid Game?...
5. Do you need a vapor barrier in the attic? Do you need a vapor barrier in the attic? In hot-dry climates a vapor retarder should also not be installed, but attics can be vented. All attics — vented or unvented — should have an air barrier (a properly detailed airtight drywall ceiling, for example) regardless of climate....
6. Who is the girl 67 in Squid Game? Who is the girl 67 in Squid Game? The tragic hero of Netflix's Korean battle-royale sensation Squid Game is North Korean defector Kang Sae-byeok—player number 067 (played by HoYeon Jung)—whose redemption comes with a glass shard stuck in her side and a steak dinner she can't even enjoy....