100%, I totally think it's happening. Fiamet is TOTALLY a limeblood.

[spoilers for Friendsim ahead!]

Fun fact I just found out yesterday on the wiki: in Friendsim, in the bad ending in Bronya's route where you cause a disaster in the caverns and cause many, many young trolls and wigglers to be killed, lime blood is apparently seen splattered on MSPAR! Considering the whole route serves to establish the idea that some jades go against the rules and take pity on grubs that "should" be culled, and this little visual detail implies that limes are still being born... (I hope the image embeds, but in case it doesn't, here's the link: https://static.wikia.nocookie.net/mspaintadventures/images/a/aa/Bronya_ending_lime_highlighted.png/revision/latest?cb=20200211221026)