I think either way we will have to power up. Cindy just put herself on the list.
Callisto wants us to kill the cave thing, she will not care much until that is done. Cindy being the right hand of Callisto seems a bit too much credit for what she actually does, she's a bodyguard, messenger, maid, whatever Callisto needs, but hardly has any authority of her own. Besides that, i would not be surprised if MC kills Cindy, it would actually please her...
So far she mostly seems to want to be entertained by you by showing your value as her "offspring"...