There's a prompt out there about how Newt was super well known in the smuggling world as someone not to mess with. So imagine Newt and Graves going to some bar where a ton of smugglers come to trade with each other. When everyone stops and stares with terrified looks, Graves thinks they are looking at him, but then he realizes they are all staring at Newt. That night Graves learns just how fiercely protective Newt really is and just how powerful Newt actually is.

Bonus Points for Fluff or Smut.
And if Graves had heard rumors in the past about some insanely scary man who was taking the smuggling world apart and he realizes that it is actually Newt.