All adjectives with soft singular ending = -ží (boží), -ší (kratší), -čí (dračí), -ří (zubří), -dí (medvědí), -ní (polní), -cí (hrací).
A typical representative is "jarní": https://en.wiktionary.org/wiki/jarn%C3%AD#Adjective_2
Regardless of the Czech sentence, "We are last women" is not correct English - you need the article there, so it's "We are the last women."
Similarly, you would need to include it in "We are the first women."
If there were a different adjective, for example, "Jsme mladé ženy", you don't need the article anymore - "We are young women." (In fact, it's closer to the czech sentence without the article.)