The article discusses why Missy, a character from the TV show Young Sheldon, is considered the best character on the show. The writer explains that Missy stands out due to her humorous and spontaneous nature, often stealing the spotlight in scenes with her comedic timing and witty remarks. Additionally, Missy is praised for her relatability to viewers, as she deals with common issues faced by young girls such as friendships, crushes, and sibling rivalry. Despite being a supporting character, Missy has a strong presence on the show and adds depth to the storyline with her unique personality. Overall, the article argues that Missy is the heart of Young Sheldon and plays a vital role in making the show entertaining and engaging for the audience.