It is getting pretty obvious that she will 'betray' and somehow formally join the other ream, however that is decided... I dont see them signing formal documents to that effect... And then break some rule and lose that team the big penalty.
okay okay I actually really like kokorogis character-- im hoping that yuuichi Hans planned this solely cuz I want kokoroki to be deceiving them on her own, but her character is literally like the secret bomb; everyone thinks she's sweet and timid but in actuality she's an amazing actress with manipulative skills...or that's at least what Im hoping she is...