Mayim Bialik plays the leading role.

In the last episode of the third season, her appearance was too dazzling, which directly raised the audience's expectations for the fourth season by n levels. Amy is a neurobiologist by profession. In the fourth season, she was Sheldon's "girlfriend" (Ersheng always denied that "she is a girl, she is a friend, but not a girlfriend", and the fifth season 10 officially confirmed the relationship between men and women, but it is also a contractual relationship that Sheldon is good at). In the fourth season, Sheldon dated her for the first time. People call her and Sheldon "Shami" (Sheldon &; Amy)

She has many similarities with her ears.

Judging from the fragmentary clues in various places, her childhood and even her youth have always been lonely until she appeared in the play, such as "I didn't kiss for the first time until I was 22 years old, and because I threatened him with his insulin", so I relied on Penny to improve her. For example, when shooting a video, I said, "Look at this gorgeous beauty (Penny) and the woman who is going to get married next to her (Bernadette, who should be the protagonist).

Since the fourth season, it has gradually risen to a permanent role.

[The above is taken from Baidu Encyclopedia]