Kaguya was a very cold and rational individual, but she slowly changed after joining the student council. During her earlier days in council, she considered Miyuki Shirogane as one she would be fine to be in a relationship with if, and only if, he confesses first, thus she constantly plays mind games in trying to get him to confess. Later in the series, her actions imply that she is starting to accept her feelings of liking Miyuki, but won't openly admit it.