Chaewon is a Queen, but it’s undeniable that she was most likely rigged in. The order goes
Yuri and Chaewon failed to enter top 12 before the final episode, so it’s pretty unlikely they got there on their own.
Still, I’m incredibly grateful they were rigged in if they were, because they added a lot to the group.
Considering the fact that those 4 members brought a lot of talents into izone (3/4 members who were considered aces in izone appear here), maybe those producers did what they had to do to make this group survive the “talentless” criticisms