1. Since the very few remnants who escaped by chance can grow to the current number,
2. There must be a way to obtain physical bodies in batches;
3. Even if it is really well-behaved and only relies on the mother's body for reproduction, it is absolutely impossible to only have a few at a time.
4. The devil who had no concept of kinship was born in this background,
5. How could it be possible to grow up with a housewife and mother like in your dream?