Damn, to be honest, she scares me. The combination of her intelligence and lack of basic social understanding makes her really cold, I understand why Cordia is trying to keep her away now. Wouldn't want anything to do with her.....
Well, according to Wilfred, she's supposed to have Serpent level potential, so I'm not surprised that she has that "scary" level of intelligence that even scares MC at times.
Yeah, I think one of the most evident (though there are several implied scenes as well) scenes of her lack of social understanding is her (and Luna's scene) with Jalen at the park. Jalen warns them should the DeLuca's contract harm the MC in any way, he will come for them, and while Gracie is quick to anger, Luna remains calm because she knows Jalen (despite his words) means well.
I don't think just based on the first impressions (of Luna & Gracie) alone, that we would have imagined them to be like that (which makes it more interesting).
Despite that, I really do like her character though (even though I like Luna & Cordia more than her). Sure she can be scary at times, but other times she comes off as lovable oddball.