Ursula
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Not entirely intentional, but still, I figured out the clue and exposed the murderer, revealing the victim of tonight's crime.
They could have at least said who went where, but everyone pretended they were solving the mystery...
And at night, it was obvious that Neiru would be killed, so why did Toxa protect her, and they even had a healer.
In short, it wasn't just my fault. :(