Just realized my 'virginal, pure as the driven snow' darling Lydia looks like those Gelflings from The Dark Crystal. Though a skeksis would have been more appropriate.
Now, as for Lydia's development...
Both paths have pretty ginormous plot holes, the NTR route has the biggest ones. Some of the interactions (AmRose's anality) make sense from the evil perspective, now, but not from the good perspective. Also, the aftermath of the big reveal in both storylines (gee, I have to pass my exams, let's start some black ops against my professors, and completely ignore anything and everything to do with Lydia now) doesn't make psychological sense. If MC loves her, he's going to try and find the real culprits and save her from jail, if he now hates her, he's going to have to make sure her accomplices are dealt with AND there is no certainty that Lydia was arrested, there's just a mention that a suspect was remanded in custody. Everyone just presumes all problems have been solved by now when they obviously haven't.
(Also, the way he escapes from the Dungeon is wayyyyyy too easy and I was braced for Lydia doing a bunch of bad things to him which didn't come to pass - though she had every opportunity. The scene where she asks MC's fantasy about what he wants to do with her - and she reacts horrified no matter what he says - could have been used here where she subjects him to his choice).
All told, I'm not in love with the way this played out but the sheer chutzpah of taking this approach is impressive. So I'll keep on following this to the bitter(sweet?) end. I do find myself liking MC less and less, though, his dom ways really don't sit well with me at times. And I feel we didn't really get enough emotional fallout from the big reveals that turn his world & the game upside down in both paths.
All told, I wish Lyssa had been the big bad. Then I could have felt even better about pushing the character away at every opportunity.