You’ve thought this through for sure and I love your decision to go with Deep POV for these characters. In the case of your story, I like how you are utilizing Deep POV and being in such limited perspectives as a pro to the mystery reveal. Sounds like you’ll really take readers for a ride.
And I was happy when I read this:
It’s true that unreliable characters work SO well in deep pov because they can really trick the readers. The key is that the unreliable narrator believes their reality, even if it’s not all happening the way they think it is. I.e. Girl on the Train.
Katie McCoach, Instructor
Grow your best story!