Francine and Brain are characters on Arthur, which the thread is talking about. Everyone in the Arthur universe is an animal, but some animals are black people (like Brain's family, I think, because they celebrate Kwanzaa.)
L-R is Muffy (monkey,) Brain (bear,) D.W. (aardvark,) Buster (rabbit,) Arthur (aardvark,) Francine (monkey,) and Binky (dog.)
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The promo pic doesn't do the actual colors justice, in the show Francine and Muffy (both monkeys) are very different colors:
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But I don't think it's meant to imply Francine is black, since her family is canonically Jewish:
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But fwiw I always assumed Francine and her family were black
and Jewish, like Sammy Davis Jr. I'm not sure off the top of my head if there are any characters in Arthur with the afro-textured hair, though, which I guess would be the only actual way to tell if a character is supposed to be black in Arthur.
Edit: There was a black celebrity guest in Arthur! Joshua Redman, a black saxophone player, is Francine's distant cousin...and a cougar...and looked like this:
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yeah idk how anything in Arthur works