And she indeed felt more like an artificially created waifu than a proper character.
Thing is, if you go by tabletop info, she was turned by Desna around 4630 and was already several hundred years old before it. So she spent 85(!) years in the hostile part of the Wound, successfully double agenting and fooling countless demons and cultists to steal info.
Knowing that, it is really difficult to believe that her timid schoolgirl persona that cries at the drop of a hat could be anything but fake.
And that is without even touching technical aspect of the writing that suddenly goes full fanfic whenever her romance is nearby. It is hilarious that's an only interesting thought about about her character - fact that Arushalae's current state was magically enforced (she resets to default settings after abandoning her quest) comes from Daeran's author, of all people, as a part of his banters with her.