Character: Missy Cooper

For those who might not know, Missy Cooper is Sheldon’s fraternal twin sister. Ironically, she’s the direct opposite of her bother in many ways. You see, besides being a female, Missy is very charming and amicable as well as possessing a very cheeky sense of humor. What’s more, Missy is one of the main characters of Young Sheldon, where she fights with Sheldon for attention from their parents.
When Missy first appeared on the Big Bang, Leonard, Howard, and Raj fall over each other trying to get her attention. In fact, Raj is even inspired to being taking an experimental medication to overcome his shyness towards women. In season seven, Missy gives birth to a beautiful baby while Sheldon comes back to his hometown to look after her.