Assertion: big bang theory's character | /r/HasProperty | introduced over time
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text: Over time, several supporting characters have been introduced and promoted to starring roles, including coworker and romantic partner of Leonard Leslie Winkle, Sheldon's wife Amy Farrah Fowler, Howard's wife Bernadette Rostenkowski-Wolowitz, comic book store proprietor and friend of the other characters Stuart Bloom, and Emily Sweeney (though the Emily character was introduced as a girlfriend for Raj and when those characters broke up Emily no longer appeared).