So, she is indeed an attempt at Fall-from-Grace sans what actually made F-f-G a sympathetic, appealing character and probably one of the most interesting companions in PS:T. As in, the most shoehorned and unconvincing way to make a succubus redemption story instead of a background of defiance of one's pre-coded nature that follows the game's theme of a party with heavily messed-up pasts that everyone has to carry as a burden.
I agree; I don't think Arueshalae was actually intended to be a bait of any kind, but she does seem like a fanfiction attempt.
As for Camellia, well, she is a psychopath. I don't think she was intended to be likeable, with the predictable result that most players don't like her. I'd still have expected someone with high wisdom to be better at hiding her nature. She kind of reminds me of Astarion in this regard.
