It is really a multi dimensional question.. I think we all have a core nature. From my side I was always an emotional and childlike person.. The years passed and I am still same ;) I know that even if I am an old woman in future I will stay same. But of course we are changing our behaviours and habits by the time. We are going to be mature. We don't get angry or sad or fearful to the things we used to be in past.
That is exactly what I think on the matter too :)