ha, that's obviously the interpretation i lean towards too, but it's hard to prove it one way or the other so it's pretty much headcanon territory.

as long as you focus on the underlying attitudes and their external expression, you'll probably be okay! many people have supposed conflicts in their behavior that make sense if you know their whole deal. someone can be a rapist and still be very charming, make lots of friends, be perfectly nice to most women, etc. and pre-reveal he'll still think in terms of "fake vs true shadow self", so he'll be... less integrated and more focused on hiding his dark side, if that makes sense.

adachi is a villain i enjoy seeing around so i hope you have fun with him!