Little Sister is a fictional character portrayed by Megan Charpentier in the TV series Psych.
In the first episode they appeared in, titled Yang 3 in 2D (season 5), they were 9 years old.
They appear in 1 episodes out of a total of 120 aired
Episodes1
Yang 3 in 2D
episode S5.E16 december 2010A woman tells the police she was kidnapped by Yin. They do not believe her but Shawn does. When she is missing again, Shawn and Gus think she has been kidnapped again. Yang is released from the psychiatric prison to help find him.