Ok but I feel like this guy knew him and I want that story

Need to know the relationship between Finn, this stormtrooper, and the one that died in Finn’s arms.

I already read a fic that gave the dying trooper designation FN-2003. I need some fanon to fill in the gaps.

I think Finn made friends fast, boy had like six people shouting traitor at different points of the movie.

FN2187 was popular and his defection pierced the hearts of the entire fn troop

YOOOOOOOO I HAVE THE CANONICAL ANSWER FOR THIS AND I’M SEEING ALL THESE TR-8R POSTS I CANNOT STAY SILENT.

Greg Rucka’s Star Wars novel Before the Awakening is A) Quite good and B) Explains much about Finn’s stormtrooper training and social circle leading up to the movie. 

In a nutshell: 

• Finn was trained in a squad of four boys: Him (FN-2187), Nines, Zero and Slip. 
  
• Nines and Zero have nicknames based on their alphanumerical designations (Zero’s is FN-2003, likely used by the ficcer mentioned above, Nines ended in 9s, etc.). Slip was called slip because he was a fuckup. 
• Turns out, most troopers have nicknames
• Why does FN-2187 not have a nickname? Because nobody really likes him. An older trooper tells him straight to his face: he’s an outsider. It just happens to some troopers. 
• Why is this extra tragic? Is it because Finn’s a shitty trooper? NO. He’s actually top of his little trooper class. He’s the fucking bomb, with a blaster, with tactics, with hand-to-hand weapons. Phasma’s got extremely high expectations for him. (what a fuckin mary sue amirite)
• So why is this actually extra tragic? What’s Phasma’s one problem with him? Finn cares too much. He cares about keeping his squad alive.
• He cares about going back for his friends more than the mission objective SOUND FAMILIAR? 
• So Phasma tells him to stop coddling Slip or face consequences. He does. 

And then: the skirmish on Jakku. A trooper dies and Finn loses his final shred of faith in the First Order. Who is that trooper? PROBABLY SLIP, IT REALLY SEEMS LIKE. Basically Finn’s brother, even if he never really fit in with his squad.

And then: the first thing Poe does is give him a nickname based on his alphanumerical designation JUST LIKE HIS TROOPER FAMILY, NINES AND ZERO AND SLIP, WHO NEVER LIKED HIM ENOUGH TO GIVE HIM ONE. 

IN CONCLUSION the trooper in the gifset above who recognizes Finn on sight (and who has been meme-nicknamed TR-8R) is likely Zero or Nines. 

IN CONCLUSION finn my bby D: