This is a discovery that has already been posted on TikTok, and has been referenced in the theories chat. Although this is not my original theory, I'd like to open up a discussion thread about it.
When reversing Nico's audio at the very end of Paladin Strait, a hidden message is revealed:
Use that code.
Wait for me.
[unintelligible]
Wait for us.
The question is...what is "that code," and where do we use it?