I don't see it quite that way. Alex is utilizing MC's strengths but she still cares about him. She knows she has control over him and that he's loyal to a fault. He is, almost quite literally, like a puppy. She always means it affectionately. I don't think Alex herself really realizes
what she is actually doing. Her fear for her father and the situation that they find themselves in has overridden how she normally would be. She's taken steps that have started to lead her down her father's path. I don't really think she is fully aware of it and it was something she said early on. That she was afraid that she was "more like her father than he thinks". I think it is on the MC to curb some of Alex's irrationality and not let her go down the dark path. And that's an interesting hypothesis about the dreams and adds another layer to them, but I don't think that's all they are. They're supernatural.
The MC heals abnormality fast from wounds that should have been fatal or debilitating. The MC has almost never been sick according to an in-game comment. The MC has nearly superhuman levels of strength and maintains his physique with minimal training and caloric intake. On-screen, at least, he eats nowhere near enough food to keep up his body and muscle mass to those almost bodybuilder freakish levels that he has. I mean, rule of cool is a thing and fiction is fiction but combined with everything
else that is going on? The shared dreams between Isabella and MC. The increased healing factor. Alexandra's heightened intelligence (she's at the top of her classes and school has always been easy for her with seemingly minimal effort save for cramming before an exam). In fact, all three main characters are quite smart and quick-witted, albeit in slightly differing ways. Even the Player-MC. He's shown that he's "not just a brute" on several occasions but to other characters, not to Alexandra. Hell, even the MC's ability to attract women and somehow them being at least a little okay with the poly-amorous nature of their relationships is almost supernatural. Again, rule of cool, fiction, power-fantasy, and it being a erotic/'porn' game all play a part in those choices from a development standpoint. However, In-Universe, it starts to make a bit of sense if you think about it as being something 'supernatural' about the Player-MC and the situation they're in.
It is possible I'm seeing things that aren't there, but that's what I find interesting besides just the top-layer of the plot. There are several layers of things going on and several possible explanations. It isn't as clear-cut as it might seem.
Edit: Not to mention James' sister knowing about "Cherubael" as well as Izzy's mother's situation. Also, thinking about it, I think perhaps Alexandra might have some form of Dissociative Identity Disorder (aka "Multiple Personality Disorder") that separates her 'domineering Boris-like side' and her normal personality.
I imagine that depending on the choices you as the player choose (that don't lead to immediate dead-end game overs) will have an affect there. Whether he accepts the berserker blood rage that makes him violent and learns to channel it into a weapon and becomes a cruel kingpin or if he's able to curb and beat his darker nature and pull himself and the girls back from the "darker path".
All in all, there is a lot of
weird shit going on that can't just be explained by psychoanalyzation and Oneirology. Something, even if not entirely supernatural in nature, very fucky is going on.
