The Mcpoyles Sister [new] -

And she’s already decided your firstborn’s name.

Finally, the character is a masterclass in the show's commitment to "anti-casting." Traditionally, a "sister" character in a sitcom is introduced to be the "hot one" or the "sweet one" to contrast with the ugly brothers. The writers could have easily taken the easy route, making her attractive to facilitate a cheap joke about the brothers being overprotective. Instead, they committed to the bit. By making her visually indistinguishable from her brothers (played by a male actor in drag), the show rejects sitcom conventions entirely. It refuses to give the audience a break. There is no relief, no "pretty sister," only the McPoyle monolith. This forces the audience to confront the raw, unfiltered comedy of the situation without the safety net of conventional attractiveness. the mcpoyles sister