Proportionally more of this story is real than is usually the case:
All dates and historical events are completely accurate.
Only Inga, cruel policeman, street thugs, old couple, and hooded man are fictitious.
Wallie, Helga, the coven and all their activities not related to the Third Reich represent real people and events of
the recent past.
Absolutely every other character and situation is completely real and in the exact time period and place indicated.