The leader of the group of the weak. She wants to collect 100 coins so that she could put a stop to the game. She created the group as her power isn't suitable for fighting and needs the help of others if she wants to be able to collect the coins.
Her ability allows her to make a choker out of her hair and when worn, it will fuse with the person's skin and become invisible and if the wearer is to tell other people's secret, they will die. The way it works is that If the person feels like they betrayed someone, the choker will react to those feelings and cut off their head. She wished for this power because a close friend betrayed her and told her secret.
She was in a relationship with a female teacher. However, the female teacher was worried that the relationship might lead to trouble, so she cut off all ties with Sayaka. Because of this, Sayaka confided in her close friend. However, her close friend betrayed her and told her secret which led the the female teacher committing suicide.
