It seems the who is Bourbon topic is still rather heated.
Sera.
Subaru.
Amuro.
Quite interesting.
Those who know it, has anyone ever got the feel I did, as this all strongly reminds me of this:
http://aceattorney.wikia.com/wiki/Yatagarasu
Complexity is near the same.Hints were given to 3 people as suspects.In the end all 3 were working together with 1 of them having betrayed them since the beginning, even changing their look.
Just thought I shout out this possibility.
As in:
Bourbon = All 3 yet one of them is infiltrating the BO.
Very reason why we were shown all 3 answering their phones when Vermouth called Bourbon.
As said, just a thought, so don't bash me.