Just binged it trough... and i dont even like stuff like that normally
@Sashimi: As far as i understand it, its more like the memories of someone else? Like, she has them, but they are less like her real own memories and more like something that you dream of. So, she is just that child, with memories of someone else on top, without really having the experience of that someone.
(Which is better than in most Isekais i feel? Because, she really is a child, so she can behave like one, in most other isekais its like that 30+ man, that suddenly behaves like a 15 year old, just because he is in the younger body...
well, not that i dislike isekais like that, but it is a bit of a plothole somewhat
)