Instead of using the collar for security, Pavlos uses it to exert control over Emiri.
: The collar allows the wearer to be "frozen" in time. According to the plot, while Emiri is frozen, her mind can be influenced by verbal suggestions.
Rikako gifts a specialized collar to Emiri's bodyguard. This device allows the wearer to be physically "frozen" or paralyzed at the controller's command.