Hmm, I guess it would seem like that at first glance. Lemme try to break it down for you as best as I can (my memory's not the best)Well, I don't really understand what he meant by saying that MC is the only one who can help Maryen get to the good side, she doesn't even have a bad side. Because looking at both her paths, she didn't do anything that would be considered evil in either of them. That's why I asked that question because I can't understand why he called one side good and the other bad when in both sides Maryen didn't do anything bad to be considered evil.
SPOILERS
1. When you find out about Maryen's eyepatch and that scene with Elliette plays out, it's quite obvious Elliette didn't consent to it (even if she is enjoying it)... Maryen usually cares a lot about other people's comfort, but this one just enjoys dominating people (it's kinda hot)
2. In that scene with the demoness nun, depending on your choices, she confesses how the idea of the MC being at her mercy turns her on and how she's imagining crushing him. She also presses a too hard.
3. There's a scene where some random tiny on the street provokes her, and she steps on him and crushes his leg if MC doesn't stop her.
4. Conflict between Elliette and Maryen: depending on how MC influences the narrative, their argument can be super aggressive with lots of screaming, or it can be much calmer. (Idk if it's through Elliette or Maryen's route).
So basically, Maryen puts up a gentle persona, but she's not actually like that. She's split her personality into two halves and suppresses one of them. It's not that the side is "evil", no one in the game is if you think long enough about it, but being the Guardian of a major kingdom and also in the top 3 most powerful giantesses, her impulsive actions from her other side can cause so many problems. Both her sides respect and love the MC, so really, it is us keeping her on a leash. Again, all this is from memory, and I played her route a few months back, so I may not be 100% accurate