The last reason is Cathy's friendship. Roy and Karry are good friends who grew up together, and they have a deep friendship. Cathy can show their friendship well on various occasions. For example, in Happy Camp, Roy sang Love Transfer for Karry, which was also a good opportunity to show their friendship.
In addition to eyes, another important feature of Cathy is tacit understanding. In variety shows, Cathy often cooperates tacitly. For example, in Happy Camp, they once completed the riddle guessing session together, and Cathy's tacit cooperation was impressive. In the stage performance, Cathy's tacit understanding is also very important, and the two can cooperate with the dance movements very well, making the whole performance more perfect.
The last reason is Cathy's friendship. Roy and Karry are good friends who grew up together, and they have a deep friendship. Cathy can show their friendship well on various occasions. For example, in Happy Camp, Roy sang Love Transfer for Karry, which was also a good opportunity to show their friendship.