Priya Koothrappali

Priya Koothrappali is Raj's sister. She first appeared in The Irish Pub Formulation.

Character Info
Priya first met Leonard and the other guys on April 12, 2005. Though both Howard and Leonard found her attractive, they made a pinky swear with each other not to hit on her on the same day at a Bob's Big Boy hamburger restaurant at Toluca Lake. In The Irish Pub Formulation, it was revealed that although Leonard made the pinky swear he had sexual relations with Priya, in that episode they slept together again. The next morning, Leonard admitted that he had feelings for her, but she turned him down. In spite of this, they apparently parted on good terms.

It has been revealed that Priya has attended Cambridge University (UK) to complete her undergraduate studies in Law (LLB degree), where she shared a room with a Texan. Priya graduated top of her class, and can practice law in 3 different countries.

In The Cohabitation Formulation she made a second appearance, in this episode she started to date Leonard although Raj highly forbade it. Penny was sad because of this and is comforted by Amy who claims Penny is her best friend. In The Prestidigitation Approximation, Priya starts to change Leonard slowly (eg. Contact lens), but the biggest transition she asked of Leonard was to cut his ties with Penny (or at least keep their distance) because she believed he shouldn't hang around his ex-girlfriend too much. Bernadette and Amy later join her in disliking Priya. In The Engagement Reaction, however, Penny and Priya did some friendly bonding, discussing Leonard's sexual peculiarities, such as his unusually long foreplay.