The people calling her a fool or dumb seem to really lack critical thinking , she may have lived for multiple lives but she never became an adult in them , she always died as a CHILD , maturity here doesn't work like this , she has always been a child , A TORTURED ONE at that so she never experienced being a full fledged adult , she was just a little kid reapedetly dying without ever knowing what it means to mature or grow up , so she will of course still have a child mindset + she couldn't experience childhood , and that adds up to why she acts childishly sometimes , even ADULTS who meet problems at their childhood act like kids at times , so why are you guys mad at a KID acting like ONE
I don't know for sure if she always died as a child, I've been assuming late teens for the average. The point still stands though - she was tortured for years since was a child and was never given opportunity to grow and mature. Her body might've, but her mind didn't.
Plus, abuse and torture can easily fuck up adults as well, making them regress in age and act more like children. It's an actual thing, look it up if you don't belive me. Honestly, she's strong for being able to continue forward after literal decades of abuse.
Fr some people here seem to lack comprehensive reading skills and empathy, or are just used to many of the faster-paced stories that also tend to ignore all potential trauma the characters have. (This isn't the greatest at portraying it, but I'll take it since it doesn't brush it off as a simple fact. I also assume the divine power may have something to do with her mental strenght/it healing so fast.)
Guys she declined his offer because she didn't want to hurt him , if he calls her nuna she will always mistake him for yuni , and in the future of it we're to be revealed to him , he'll come to the conclusion that it's not him that she loves but yuni and that he is nothing but replacement for him + she is protecting her mental health as well , she obviously has trauma from losing her brother and she doesn't want to live it again specially since Caleb is the carbon copy of yuni