Warning! Spoilers ahead for the Young Sheldon season 6 finale. Despite becoming a problematic child, the season 6 finale makes Missy's much more heartbreaking. Sheldon's sister rarely visited Pasadena, but every time she was in town, she was nothing but sweet, social, and charming. Missy was so different from her twin that the rest of the Pasadena gang couldn't help but marvel at her. As delves deeper into her childhood, however, it is becoming increasingly clear that her appearances were secretly sad, and the season 6 finale just further emphasized that.
For the longest time, Missy has been
After getting away with sneaking with Tonya, Sheldon rats Missy out after he catches her leaving again. While she attempts to convince him to keep his mouth shut, the boy genius just couldn't keep a secret that big. Missy is completely wrong, but that doesn't stop her from being angry at Sheldon — to the point that she refuses to talk to him even after he apologizes and explains that he is just worried about her. It's unnerving seeing the only Cooper daughter this angry, especially since she tends to be always patient and understanding. Not only does she return Sheldon's walkie-talkie, but she also explicitly says that she hates him.
has demonstrated time and again how growing up with Sheldon has made things difficult for Missy. Despite that, however, when she appeared in , she was nothing but sweet and supportive to her brother. Considering everything she had to go through in her childhood, Missy seemed to eventually accept the harsh reality of being than her genius twin. Even when Sheldon was still criticizing and humiliating her, both in front of his friends and privately, she kept her cool and decided to brush off every snide comment.
Considering Missy's appearance, however, expect that the Cooper twins will eventually patch things up. Sheldon may have to live with the rest of the summer in Germany knowing that Missy is mad at him, but the separation may actually be needed for this situation to be resolved. For what it's worth, the finale shows her finally mellowing down on her rebellious act. In any case, Sheldon and Missy have enough time to sort out what happened in season 7.