yeah that's what they're going for they're like "oh she's exactly the same as when she was 3, she acts really childlike, she always talks like she's younger than she is"this is clearly an indication that something is going on, a 9-year old shouldn't be the same as a 3-year old
If Kumasawa is actually Beatrice's mother, you heard it here first. I called it.
Battler is very... unprotagonist-like. He doesn't seem to have the mental capacity to solve a mystery, much less doing any investigating.