Natsuhi was shot at some point previously, maybe during the murder of the first twilight, and from that point forward somebody else impersonates her. At the end her actual corpse is taken out
Leads:
- It explains why she would run away from the parlor.
- It solves the red with no extra people at the end.
Obstacles:
- We ran out of possible candidates.
- If our culprit X is Natsuhi who is always with battler at the end, who's killing people?
- Convincingly passing as somebody else is quite hard when you think about it, you would need a lot of practice.