You are Bourbon. You've discovered that something is wrong with the world, and you must follow these rules to survive.
Rule One: Remember, you must play the role of Toru Amuro, and make sure no one finds out that you aren't Toru Amuro. Otherwise, you will...
Remember, under no circumstances let yourself become Toru Amuro!
Rule Two: If someone calls you Rei Furuya, ignore them! Don't turn around! Don't respond! Don't pay attention! If you do answer, turn around immediately, run away, and shake off whoever is chasing you!
Ignore them! Ignore them! Ignore them!
Rule Three: If you hear someone call you by the codename ZERO, remember that whatever you see is an illusion!
Only the dead would call you ZERO!
Rule Four: If you feel any unease during a Black Organization gathering or mission, hide your unusual behavior! Beware of your colleagues!
They could hunt you down at any moment!
Rule Five: Only one of Bourbon and Rei Furuya can exist.
If you've discovered the first four rules, then you aren't Bourbon!
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Original headcanons and OOC warning
Theme: Find yourself.
He looked back at the road dripping with blood, but he couldn't step back and go on step by step.