Aria do have a list of target for revenge though:
_Miele Roscente: She use all her force to make Aria into a vilainess then get her executed
_Emma - Miele's maid: the direct hand control the maid and servant, also who indoctrine the servant into hating Aria
_Beri - Miele's secret agent: the hidden hand directing Aria into vulgar and hateful behaviour, also the direct "witness" that push her to death. She encourage Aria bad deeds while collecting evidence for Miele to act on.
_Cain Roscente: lust after Aria but hate her for her commoner origin. Hide this quite well under a strict act, but he want to erase her for his noble self (or just to keep her for himself in secret).
_Count Roscente: lust after Carin, Aria's mom, ignore many thing to marry/monopoly Carin, almost everything happen from this man irreponsible behavior. Shower his own blood with decorate, hide his shameful "daughter" as much as he can, ignore Miele/Aria conflict, ignore Cain action, he build the base for all this.
_Isis Frederick: the true force behind Miele hatred to Aria. She want Roscente family to be her force, dont want the "dirty rats" in it, but make Miele think that her marriage with Oscar Frederick and her honor is tarnish by them, then encourage Miele to "cleanse her house". This time around Isis have a much bigger reason to hate Aria though.