who the real villain is

so i just read major spoilers and lots of things that weren't revealed but... isnt the duke the real villain? he manipulated everyone, jieun, aristia, and rev were actually innocent for the most part. Jieun who was just transported into a new world and frankly a big naive idiot believed the lies the duke spouted and just did what she had to do to "survive." though it certainly was stupid of her.. anyway this is kind of a similar dynamic to your throne/i want to be you for just a day. aristia is medea, yvelios is the duke, and psyche is jieun. but ngl i still hate rruve and jieun LOLLL