Autistically
Well at least you're straight up and honest now. This contains an anti-hero at best wishy-washy villain mc. There's no need to make his characterization to complicated. The fact that a 100 year-old Man, can somehow come to love a woman as manipulative as his own mother in a matter of a couple of years is baffling. Not even a 13-year old orphan can acclimate this quickly to a complete stranger.
Autistically:That's the beauty of it Lol. He is a man who has experienced two lived, 100 years at peak, rollercoaster coaster rides. Plus I think since it's still chapter 10 it's not clear yet, but he isn't cold hearted and emotionless at all. he is just cautious and rational. He is in fact feel attachment to even Iris who is now his mother. Can't you see their happy interaction. it is just that he can't open his heart, his mind always calculate and calculates. Not like it's a bad thing since it's an evil, but there will be Character development. of course it won't take away his essence of being evil and rational, but he.will be more open to his emotions. If you have read my Villain Simulator, you will know how an evil villain can Manipulate and love at the same time.