Kunal Nayyar's character, Raj Koothrappali, has always been a favorite among fans of . His awkwardness and introverted nature made him relatable to many viewers. Raj's struggle with talking to women without alcohol was a running gag that eventually saw him grow more confident over the series. Yet, despite his growth, Raj ends up single by the show's finale. One relationship, however, had the potential to change that - his romance with Issabella.

Issabella, played by Maria Canals-Barrera, was introduced as a janitor at Caltech, where Raj worked. Their first encounter was serendipitous when Issabella walked into the telescope lab to clean, and the two hit it off instantly. This budding relationship brought out a more genuine and confident side of Raj that fans hadn't seen before. The chemistry was palpable, and viewers were hopeful that Raj had finally found his match.

The relationship took a tragic turn when Raj's insecurities got the better of him. Embarrassed by Issabella's job, he lied to his friends, letting them believe she was an astronomer.
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