Answer:
In common usage, accurate describes being close to the correct value. Precise, on the other hand, emphasizes the small margin of error or paying attention to the smallest details. Exact means zero deviation from the correct value.
I think you would omit the comma because the pause there sounds a little awkward to me. But not sure, it could also be the leave it as it is.
Good afternoon!!
Answer-
This reveals that the character is very compassionate. A layer that the reader has not yet seen.
Hope this helps! Have a great day,
~AcEdd