The Cast
Resistance side:
Commander Poe Dameron
Commander Rose Tico
Lieutenant Kaydel Ko Connix
Lieutenant C'ai Threnalli
The Finn
Chewbacca
The Jedi Rey
Kylo
First Order side (f = female, m = male):
General Armitage Hux (m) - Regular crew member from Finalizer legion.
First sergeant CL-0745 (f) – "Lady" Black pauldron with orange barring. Regular crew member from Finalizer legion.
Staff sergeant FL-2216 (f) – "Flag" Black pauldron with white barring. Regular crew member from Finalizer legion.
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Fire Team 1:
Sergeant FN-9013 (f) – "Teller" White pauldron, black barring. Regular crew member from Finalizer legion.
Weapons Specialist FN-9037 (m) – "Sharps" Regular crew member from Finalizer legion.
Electronics Specialist FN-9021 (m) – "Bigs" Regular crew member from Finalizer legion.
Private FN-9048 (m) – "Blaze" Regular crew member from Finalizer legion.
Security Specialist FN-9028 (m) – "Major" Regular crew member from Finalizer legion.
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Fire Team 2:
Corporal H-482 (m) – "The Old Man" White pauldron, plain. Regular crew member from Finalizer legion. Adult recruit.
Weapons Specialist TN-1017 (m) – "Ten-ten" His original legion was lost in the Battle of Crait on one of the star destroyers.
Security Specialist DL-8192 (f) – "Donner" Reconstituted legion from the Supremacy.
Electronics Specialist DL-1364 (f) – Reconstituted legion from the Supremacy.
Private FO-1282 (f) – "Spots" Regular crew member from Finalizer legion, but a different company. Not part of CL-0745's squad. She was wandering the halls after losing the rest of her squad. 1/8th non-human.
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For more information on the First Order designations, see my fic 'Making Sense of First Order Designations'.