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Sorry, I wasn’t quite right. Feminine nouns ending with -ь have identical nominative and accusative forms—animate or not.

Я наблюдаю личность. (anim., male of female)
Я наблюдаю пыль. (inanim.)

You are right.
Moreover, I don’t quite understand what the opposite would look like. While masculine nouns have only two forms for nominative, accusative, and genitive, feminine nouns have all three...