I know she has the mind of a 10,000 years old witch in the body of a 10 years old girl, but...
Are you sure you are not exaggerating with the numbers isn't she like couple hundred years ? I haven't play the games i watch the anime a long time ago don't remember the details but weren't some words of Berkanstel i think that said '' for me it has been 100 years,for you a 1000 now we will be much more happy then before'' or something like this not to mention logically and realistically makes no sense.