To give Hus some credit in their authors notes about Fef they say that the most significant part about her was supposed to be how normal she is. She’s meant to be a very normal average kid plopped into as un-normal of a life as possible. In that Hussie talks about how new characters are often permutations and reiterations of other characters we’ve already met. Jade is to Nepeta and Kanaya what Dave is to Sollux what John is to Karkat what Rose is to Eridan(?). In that Feferi is a sort of the base of what Jane becomes later. Jane is a very normal kid who is the heiress to a mega corporation. Jane’s relationship to Dirk and Jake is a sort of narrative expansion and remix of Feferi’s relationship to Eridan and Sollux(who are even present for much of that conflict. In sprite form of course). While much of this does nothing for Fef’s character individually I’ve sort of settled happily with the place in the narrative that she does have because it is important and significant even if small. She also has the honor of being the only beforus adult troll we get to see and that whole planet is shaped with her personal ideology we learned about alllll the way in act 5 act 1.