I've just read Luke Cage, Hero For Hire (1972) #5 for the first time. It's got a character in it named Black Mariah*, and I'm wondering if she was the inspiration for Pink Pearl; there are a lot of visual similarities. Same weight, same clothing style, same buck teeth with a gap.

* I searched for the word 'Mariah' on this site before posting and only came up with discussion of Peter David's Fallen Angel. That's a completely different Black Mariah.