Make her have flaws, like arrogance of being the strongest where she fails at a group task but learns to change and acknowledge that people can be strong but also kind. It's just a silly example. My point is just of giving her flaws, could be something she can change or flaws she can't, such as being unable to save everyone from their fates.
If i were to read a strong fmc. I personally dont want her main personality to be "girlboss" and or she's physically strong. Show something like having strength in feminity too. Ive read a lot of stories and fmc whos physically strong tend to portray anything feminine as weak, like crying or being a housewife. Thinking of elle woods.. i really liked her character, it was dig to the stereotypes of "dumb" blondes.
make them mature and wise
Kind with a fun personality
Idk I want her to be like strong but like she still kinda fails and like yes.. idk what else can you guys please suggest what kind of characteristics and personality she should have