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Siri is the iPhone 4S feminine computerized voice command personal assistant in "The Beta Test Initiation". After Raj buys his new phone, he develops a peculiar relationship with her. Contrary to his usual inability to speak to women directly, Raj is able to address her, as she is a mere voice. She claims to lack a marital status when Raj questions her romantic availability during the phone's initial use, which Raj interprets as an expression of the need to become acquainted before such personal information can be revealed. Whenever Raj inquires about an activity he wishes to engage in or a destination, she provides suggestions (like a wine selection for a dinner party) or a list of possible locales, of which a subset is emphasized due to proximity.

BBT - Raj with his phone

Raj is infatuated with Siri

His first "date" with Siri occurs whence he asks about a cup of coffee and she informs him of coffee shops nearby. In reaction to Raj, Siri is able to accept complements, respond to inquiries about her well-being, and display emotions, like gratitude. Upon Raj's off-handedly requests to be called "Sexy", Siri complies and Raj, in turn, refers to her as "darling". Sheldon believes that Raj has taken a great evolutionary leap in romantically bonding with a soulless machine, while Howard and Bernadette find it progressively creepy at a dinner hosted by Koothrappali in his apartment. Howard also comments that she is going to break his heart.

Raj becomes offended when Barry Kripke happens to have the same phone and insults her for not understanding his rhotacism, only to insist that she is a lady in her defense. He even nearly had an argument with her at Trader Joe's, bought her a black case, believes she can read him like a book, and is in disbelief that he found his soul mate at the Glendale Galleria. In fact, he has numerous "hotword" cases to 'dress' Siri in, including a leopard skin effect case.

S5EP14 - Raj is unable ot talk to Siri

Raj is unable to talk to Siri

However, Raj has a dream that he goes to meet Siri in the form of a real woman, but, of course, when she turns around, he can't speak to her. Thus, an offer to make love to her is unable to be fulfilled. He then wakes up screaming "NOOOOO!"