Takae did not take control of marika's body. It's the same reincarnated soul. It;s just that the many years of memories flooded and overwhelmed the few memories the child has. How much do you remember what happened when you were a kid?
Guys prefer virgins and aren't fond of extra baggage. That's why they used to sacrifice female virgins to the gods because if we like virgins, gods must like them too.
You can lose a lot of weight by simply fasting (while consuming necessary nutrients).
Exercise surprisingly doesn't contribute a lot due to your body's natural homeostasis and regulation.