i must say that i find him disgusting. At the beginning, while i understood her revenge on mielle i did'nt see why she hated the father and cain too. I mean all they did was favor and trust mielle above her. Yes it was unfair on their part but she is not their true daughter/sister either plus the father did marry her mother and welcome her as a daughter when her mother was just a prostitute and aria the bastard child of said prostitute. As i understood it the only one who truly schemed against her and killed her mother was mielle alone.
I still think her wish to destroy the father and cain is too much but i agree cain is disgusting (legally she's his sister plus he forgot mielle so fast i pity her a bit.. that's his real sister!) and should be kept in check
Millie might not be the only one considering her cowardly nature to ask everything to her maid. When they were kids her maid did say omething like Aria is a prostitute's daughter and brainwashed her nice and well. Oh!, add Isis too.
Aria didn't ruin her step father of Cain though, it was Millie who did that in the end , she killed one and almost killed the other one.
Cain was the one who executed Aria, so Aria has some trauma there.
If you go back to the beginning, Aria had planned on helping the count and only taking out Mielle- but the count continued to act like the sun shown out Mielle's ass and actively credited Aria's brilliance to Mielle. Thats when Aria kicked the count to the curb.
I don't think she would have taken out Cain so much except he turns extremely yandere and gross.
JAIL CAIN QUICK