@Misticsan oh hi again just replied to u elsewhere too xD
i think its more likely if hes smart, that he will become something like a patron to the MC, i mean the MC has powerful backers and is clearly going somewhere. Frankly if it turns into DarkMoon vs MC i would find a convenient way to rewrite history (as it looks like he has already done to some extent) to make it look like the darkmoon family had always been loyal to its branches, of course the patriarch was corrupt ( a bit of forgery and messing with account books would help) and this was just one symptom of the horrid things he had done. After all what kind of parent would attack their child? (solid gold line, ill bet he finds a way to work in some lines about the role of a parent and filial piety).
Remember the difference between a righteous ruler and a tyrant is which one wins in the end and gets to write the history books, ill bet he plays this smoothly like a true pro and plays all sides of the board.
(i feel like i had a point going into this but im not sure it survived my stream of consciousness...)